Question

Fill in the blanks:

(i) A right triangle cannot have an ...... angle.
(ii) The acute angles of a right triangle are ...... .
(iii) Each acute angle of an isosceles right triangle measures ...... .
(iv) Each angle of an equilateral triangle measures ...... .
(v) The side opposite the right angle of a right triangle is called ...... .
(vi) The sum of the lengths of the sides of a triangle is called its...... .

Answer 1

(i) obtuse (since the sum of the other two angles of the right triangle is 90^o)
(ii) equal to the sum of 90^o
(iii) 45^o (since their sum is equal to 90^o)
(iv) 60^o
(v) a hypotenuse
(vi) perimeter