Question

19.Write the formula of area of the following.
a) Triangle b) circle c) semicircle d) square e) rectangle

20. Write the formula of perimeter of the following.
b) Triangle b) circle c) semicircle d) square e) rectangle​

Answer 1

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Answer 2

Answer:

19•area of triangle- 2*h+B, circle-.πrsquar , square - side*side , rectangle- l*b 20• perimeter of triangle= sum of all side, circle= 2πr, square=sum of all side , rectangle=2*(l+b)