Khan Academy: Area of Inscribed Equilateral Triangle

The problem seems simple: find the area of the equilateral triangle whose sides are each length 1. In fact, this same problem is solved in 8th grade, addressing a different Common Core standard, using the formula for area of a triangle...

Delving into basic trigonometry, this resource shows how to find the area of an inscribed equilateral triangle. Using a high-level problem, HeronÕs theorem is used to find the area of a figure. Before SAT testing, use this as a review.

Demonstrates how to find the area of an equilateral triangle inscribed in a circle by applying the area formula for a circle and Heron's formula. Some basic trigonometry (SOHCAHTOA) is also used. [11:38]

Students explore a problem that requires then to figure out the area of an equilateral triangle inscribed in a circle using a little trigonometry.

This video tutorial explores finding the formula for the area of an equilateral triangle with side length of s.

Watch Sal prove that the areas of the pairs of triangles generated by the diagonals of a rectangle are equal.

This task examines how to calculate the area of an equilateral triangle two ways: using triangle congruence and using trigonometric ratios. Aligns with G-CO.C.10 and G-SRT.C.

Learn about the area of an equilateral triangle with this helpful reference tool. Provides a detailed definition, examples, and an internet activity that enhances further explanation. Includes links to related topics.

In this video tutorial [6:59], the instructor provides a proof for the relationship among the legs and hypotenuse of 30-60-90 triangles by breaking an equilateral triangle into two congruent triangles and using the Pythagorean threorem.

Sal constructs an equilateral triangle that is inscribed inside a given circle using compass and straightedge.