Math Ch. 10

An angle that measures less than 90 degrees is called a(n) _____.

• right angle
• obtuse angle
• acute angle
• straight angle

A part of a line that extends endlessly in one direction from one point is called a(n) _____.

• angle
• point
• ray
• segment

Two rays with a common endpoint is called a(n) _____.

• angle
• point
• complementary angles
• segment

A location in space, with no length, width, or thickness is called a(n) _____.

• plane
• point
• complementary angles
• segment

A flat surface that extends endlessly in all directions is called a(n) _____.

• plane
• isosceles triangle
• complementary angles
• segment

When the sum of two angles is 90 degrees, they are called _____.

• supplementary angles
• isosceles triangle
• complementary angles
• segment

The angles of a triangle add up to _____ degrees.

• 90
• 180
• 270
• 360

A triangle with 2 congruent sides is called a(n) _____.

• supplementary
• isosceles triangle
• right triangle
• segment

When the sum of two angles is 180 degrees, they are called _____.

• supplementary angles
• complementary angles
• right triangle
• segment

Lines that intersect to form right angles are called _____.

• supplementary lines
• parallel lines
• perpendicular lines
• right lines