Equilateral and Isosceles Triangles

Front

What is an equilateral triangle?

Back

A triangle with all three sides of equal length and all three angles measuring 60°.

Tags

CCSS.4.G.A.2

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length and the angles opposite those sides are equal.

Tags

CCSS.4.G.A.2

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are 30° and 60°, what is the measure of the third angle?

Back

90°.

Tags

CCSS.8.G.A.5

Front

In an equilateral triangle, what is the measure of each angle?

Back

60°.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the sides and angles in an isosceles triangle?

Back

The angles opposite the equal sides are equal.

Tags

CCSS.HSG.CO.C.10

Front

How do you find the height of an equilateral triangle?

Back

Use the formula: height = (√3/2) * side length.

Tags

CCSS.6.G.A.1

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Tags

CCSS.8.G.B.8

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Tags

CCSS.6.G.A.1

Front

What type of triangle has all sides of different lengths?

Back

Scalene triangle.

Tags

CCSS.4.G.A.2