Q4 of 158 Page 159

In a right-angled triangle, the angles other than the right angle are

In right angled triangle


One angle is 90° and sum of other 2 angles is 90°


Then;


Both angles must be smaller than 90°


∴ Both angles must be acute

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2

Triangle DEF of Fig. 6.6 is a right triangle with ∠E = 90°.


What type of angles are ∠D and ∠F?

 3

In Fig. 6.7, PQ = PS. The value of x is

 5

In an isosceles triangle, one angle is 70°. The other two angles are of

(i) 55° and 55°


(ii) 70° and 40°


(iii) any measure


In the given option(s) which of the above statement(s) are true?

 6

In a triangle, one angle is of 90°. Then

(i) The other two angles are of 45° each


(ii) In remaining two angles, one angle is 90° and other is 45°


(iii) Remaining two angles are complementary


In the given option(s) which is true?