Curated OER
Angle-Side Relationships
Students investigate triangles and their angle-side relationship. In this geometry lesson, students identify the property of the triangles and use it to solve the problem correctly. They use the TI to graph their triangles.
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Triangles
Learners draw triangles. In this shapes lesson, students discuss what they already know about triangles, what they are and what they are made up of. Learners discuss the types of triangles and practice drawing each type.
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Triangles
Students discover the difference between triangles. In this triangle lesson plan, students discuss the different types of triangles, then draw the three different types of triangles. The teacher will draw, or model, how to draw the...
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Transformations: Rotation
In this rotations worksheet, 10th graders solve and complete 10 different problems that include measuring various types of transformations of geometry. First, they determine the measure of an angle between two pointers. Then, students...
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Measurement
In this measurement worksheet, students find the value of complementary and supplementary angles. They identify angles, parallel lines, and find the angle measurement of missing angles in a triangle. This one-page worksheet contains 10...
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Law of Sines and Law of Cosines
In this sine and cosine worksheet, students use the law of sines and law of cosines to find the required part of a triangle. Examples and explanations are provided. This three-page worksheet contains 24 problems. Answers are listed at...
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Triangle Inequalities
For this geometry worksheet, students use the inequality theorem to figure out if three segments will make a triangle. They are given the measures of two segments and must figure out the third segment on their own. There are 20 questions.
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Trigonometric Ratios
In this trigonometric ratios worksheet, 10th graders solve 9 different problems that include determining the trigonometric ratios of each triangle. First, they determine the sides and angles of a right triangle that is shown in each...
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Unit Circle and Triangle
Students apply the Unit Circle to solve ratios of triangles. In this geometry activity, students derive the different ratios of a triangle using the Pythagorean Theorem. They find the angles of a unit circle using a right triangle.
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Circles
In this circles worksheet, 10th graders solve and complete 8 different types of problems. First, they find the measures of each segment given the center of a circle. Then, students find the length of a side of a triangle shown within a...
Texas Instruments
The Leaning Tower of Pisa
Learners estimate the equation of a line, angle of elevation and depression in this math lesson. They analyze e famous landmark design and make connections to algebra and geometry. They will also generate an equation, model the x and y...
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Triangles
In this triangles worksheet, 10th graders solve and complete 6 various types of problems. First, they draw a median and the altitude from the given angle in each triangle illustrated. Then, students determine which angle is equidistant...
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Reference Angles
Learn how to measure the reference angles in degrees and radians. Students find reference angles that are coterminal with a given angle.
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Easy Worksheet: Trigonometry
In this trigonometry worksheet, students solve 4 short answer problems. Students find the sine, cosecant, secant or cotangent of an angle given a diagram of a right triangle with various measurements labeled.
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Similar Figures
In this similar figure worksheet, learners find the length of a missing side of given triangles and quadrilaterals. This six-page worksheet contains 24 problems. Answers are provided on the last page.
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Wrecked Angle
In this geometry activity, students answer questions about triangles and trapezoids as it related to the area of a shape. They make their own polygons and calculate the area.
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Tangents
In this tangents worksheet, students determine the length of a missing side of a right triangles. They use tangent lines to solve problems. This two-page worksheet contains 11 multi-step problems.
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Similar Polygons
In this similar polygons worksheet, 10th graders solve 10 different problems that include determining various similar polygons. First, they determine the perimeter of a second triangle given the measures of all angles in the first. Then,...
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Angles ~ Right Angles
Have your class review how to identify right angles. Learners identify right angles, and then write the number of angles found in each shape.
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Dilations in the Plane
Tenth graders investigate dilations and explore the dilation transformation before investigating the properties of a dilation using Cabri Jr. Students extend the concept of dilatation to the coordinate plane.
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Christmas Tree Angles
In this angles worksheet, students measure angles to make triangles and cut them out to make a Christmas tree. Students draw and cut 5 triangles to make their tree.
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The Isosceles Triangle Problem
In this geometry activity, 10th graders solve a problem involving an isosceles triangle. The problem appears to be deceptively easy, but instead requires the use of trigonometry to arrive at a correct solution. The one page...
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Triangle Fundamentals Homework
In this geometry worksheet, learners identify the missing angles of non right triangles using the angle sum theorem. They solve for the unknown using algebra. There are 21 questions.
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The Sum of All Angles
Students add up the different angles using the angle addition postulate. For this geometry lesson, students differentiate between interior and exterior angles. They calculate the different angles for triangles and use proof to show their...