Isosceles and Equilateral triangles practice

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

A triangle where all three sides are of equal length and all angles are 60°.

Tags

CCSS.4.G.A.2

Front

If two sides of a triangle are congruent, then the angles opposite those sides are __________.

Back

congruent.

Tags

CCSS.HSG.CO.C.10

Front

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

Back

180°.

Tags

CCSS.8.G.A.5

Front

In an isosceles triangle, if the vertex angle is 40°, what are the measures of the base angles?

Back

70° each.

Tags

CCSS.8.G.A.5

Front

What is the relationship between the sides and angles in a triangle?

Back

The larger the angle, the longer the opposite side.

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 formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Tags

CCSS.6.G.A.1

Front

In an isosceles triangle, if the equal sides are 10 cm each and the base is 12 cm, what is the height?

Back

8 cm.

Tags

CCSS.6.G.A.1

Front

What is the measure of each angle in an equilateral triangle?

Back

60°.

Tags

CCSS.8.G.A.5