Упр.12 Appendix 1 Математика ГДЗ Enjoy English 10 класс

12. Study the pictures and complete the definitions with the words from the box.

A right angle is an angle which is exactly 90°.

An acute angle is an angle which is less than 90°.

An obtuse angle is an angle which is more than 90° but less than 180°.

An isosceles triangle is a triangle with two sides of equal length.

An equilateral triangle is a triangle in which all the sides are of equal length.

A right triangle is a triangle in which one of the angles is exactly 90°.

A hypotenuse is the longest side of a right triangle which is opposite the right angle.