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Khan Academy

Khan Academy: Use Pythagorean Theorem to Find Isosceles Triangle Side Lengths

For Students 7th - 8th Standards
Find the missing side lengths of isosceles triangles by using the Pythagorean Theorem. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
Unit Plan
CK-12 Foundation

Ck 12: Trigonometry: Lengths of Sides in Isosceles Right Triangles

For Students 10th - 12th Standards
[Free Registration/Login may be required to access all resource tools.] Here you'll learn what an isosceles right triangle is, the relationships between the sides of an isosceles right triangle, and how to find the length of an unknown...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Isosceles Triangles

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Apply the properties of isosceles triangles.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Triangle Sum Theorem Grade 8

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Finding and understanding the angle measures of triangles.
Interactive
Mangahigh

Mangahigh: Shape: Isosceles Triangles Inside Circles

For Students 9th - 10th Standards
Determine isosceles triangles inside a circle made from chords and radii.
Handout
Geometry Help

Geometry Help: Trapezoids

For Students 9th - 10th Standards
Explains the basic concept of trapezoids with step-by-step instructions and methods for solving specific problems on your own relating to this topic.
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Determine Unknown Angles: Isosceles, Scalene, Right Triangles

For Students 3rd - 5th Standards
[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on finding the missing angles in triangles.
Handout
CK-12 Foundation

Ck 12: Geometry: Special Right Triangles Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Different types of right triangles and trigonometric ratios for special right triangles are covered in this study guide.