Angles and Triangles Vocabulary

What is a right angle?

• An angle that is exactly 90 degrees and makes a square in the corner.

• An angle that is less than 90 degrees so it is smaller than a right angle.

• An angle that is more than 90 degrees so it is bigger than a right angle.

What is an acute angle?

• An angle that is exactly 90 degrees and makes a square in the corner.

• An angle that is less than 90 degrees so it is smaller than a right angle.

• An angle that is more than 90 degrees so it is bigger than a right angle.

What is an obtuse angle?

• An angle that is exactly 90 degrees and makes a square in the corner.

• An angle that is less than 90 degrees so it is smaller than a right angle.

• An angle that is more than 90 degrees so it is bigger than a right angle.

What is a right triangle?

• A triangle with one angle measuring exactly 90 degrees.

• A triangle with all angles measuring less than 90 degrees.

• A triangle with one angle measuring more than 90 degrees.

What is an acute triangle?

• A triangle with one angle measuring exactly 90 degrees.

• A triangle with all angles measuring less than 90 degrees.

• A triangle with one angle measuring more than 90 degrees.

What is an obtuse triangle?

• A triangle with one angle measuring exactly 90 degrees.

• A triangle with all angles measuring less than 90 degrees.

• A triangle with one angle measuring more than 90 degrees.

What does congruent mean?

• Same size, same shape.

• Same size, same color.

• Same color, same shape.

• Same size, same radius.

What is an equilateral triangle?

• A triangle with three congruent sides.

• A triangle with at least two congruent sides.

• A triangle with no congruent sides.

What is an isosceles triangle?

• A triangle with three congruent sides.

• A triangle with at least two congruent sides.

• A triangle with no congruent sides.

What is a scalene triangle?

• A triangle with three congruent sides.

• A triangle with at least two congruent sides.

• A triangle with no congruent sides.