Question

16. In a right-angled triangle, what is the length of the side opposite to the right angle, if the other two sides are 12cm and 9cm?
17. Find the perimeter of an isosceles triangle if the lengths of two sides are 9 cm and 20 cm.
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ILL MARK U BRAINLIEST

Answer 1

Answer:

16. 15 cm 17.49 cm

Step-by-step explanation:

16. Side opp. to right angle means hypotenuse

Using Pythagoras Therom:-

P^2 + B^2= H^2

P and B are 12 and 9 cm

So, H^2= (12)^2 + (9)^2

H^2= 144+81

H^2= 225

So, H=15

17. 20 cm is one of the equal sides

Because, In a triangle the sum of two sides is always greater than the third side.

If 9 is the third side, then

9+9 is not greater than 20

So the third side is 20 cm

Perimeter= Sum of all Sides

= 9+20+20

=49 cm

Hope it will help you