Circles and Triangles Flashcard

Front

What is a triangle with one angle measuring exactly 90°?

Back

Right triangle

Front

What is the formula for the circumference of a circle with radius r?

Back

Front

What is the sum of the angles of any triangle?

Back

180°

Front

Calculate the circumference of a circle with a radius of 4 units.

Back

Front

Calculate the area of a circle with a diameter of 10 units.

Back

Front

What is a triangle with two sides of equal length called?

Back

Isosceles triangle

Front

What is a triangle with all sides of different lengths called?

Back

Scalene triangle

Front

What is a triangle with all angles less than 90° called?

Back

Acute triangle

Front

What is the formula for the area of a circle?

Back

Front

What is the diameter of a circle?

Back

The distance across the circle through the center, equal to twice the radius.