Question

Q. 2 Answer the followings. (2 marks each)

1. Find area and perimeter of triangle whose sides are 8cm ,19cm and 15 cm.

2. Find the area of triangle whose sides are 5cm, 12cm, 13 cm . Also find the Shortest altitude.

3. Find the area of an equilateral triangle having each side x cm.

4. Find the area of a triangle, two sides of which are 8 cm and 11 cm and the perimeter is 32 cm.

5. In a A ABC, AB = 15 cm * B * C = 13 cm and AC = 14 cm. find the area of A ABC.

6. Find the semi perimeter of a triangle if its sides are 20 cm, 30 cm, and 40 cm.

7. Find the perimeter and area of the quadrilateral ABCD in which AB = 17 cm, AD = 9 cm, CD = 12 cm , angle ACB=90 and AC = 15 cm. The perimeter of isosceles a right triangle is 60 cm and its hypotenuse is 26 cm. Find other two sides. ​

Answer 1

Step-by-step explanation:

Q 1 = Area = 1/2 × base × height

= 1/2 × 15 × 8

= 1/2 × 120

= 60 cm ^ 2 Ans

= Perimeter = A + B + C

= 8 cm + 19 cm + 15 cm

= 42 cm Ans

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