Isosceles and Equilateral Triangles

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length.

Tags

CCSS.4.G.A.2

Front

What is an equilateral triangle?

Back

An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are equal to 60 degrees.

Tags

CCSS.4.G.A.2

Front

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

Back

The sum of the interior angles of a triangle is always 180 degrees.

Tags

CCSS.8.G.A.5

Front

If two angles of a triangle are equal, what can be said about the triangle?

Back

The triangle is isosceles.

Tags

CCSS.2.G.A.1

Front

In an isosceles triangle, how do the base angles relate to each other?

Back

The base angles of an isosceles triangle are equal.

Front

What is the formula for the area of a triangle?

Back

The area of a triangle is given by the formula: Area = 1/2 * base * height.

Tags

CCSS.6.G.A.1

Front

How do you find the height of an isosceles triangle?

Back

The height can be found by drawing a perpendicular line from the apex to the base, splitting the triangle into two right triangles.

Front

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

Back

In an equilateral triangle, all sides are equal, and all angles are equal to 60 degrees.

Tags

CCSS.4.G.A.2

Front

If the length of one side of an equilateral triangle is 10 cm, what is the perimeter?

Back

The perimeter of an equilateral triangle is 3 times the length of one side, so the perimeter is 30 cm.

Tags

CCSS.3.MD.D.8

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.

Tags

CCSS.8.G.A.5