5.12 and 5.13

Front

What type of angle is less than 90°?

Back

Acute angle

Front

What type of triangle has all sides of different lengths?

Back

Scalene triangle

Front

Which type of angle is exactly 90°?

Back

Right angle

Front

What type of angle is greater than 90° but less than 180°?

Back

Obtuse angle

Front

What type of triangle has at least two sides of equal length?

Back

Isosceles triangle

Front

What type of triangle has all angles less than 90°?

Back

Acute triangle

Front

What is the sum of the angles in any triangle?

Back

180°

Front

What type of triangle has all sides of equal length?

Back

Equilateral triangle

Front

What is the name of an angle that measures exactly 180°?

Back

Straight angle

Front

What is the name of an angle that measures more than 180°?

Back

Reflex angle