MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 22

EASY

9th CBSE

IMPORTANT

Earn 100

Half of perimeter of a triangle is $20 cm$ .The product of $(s - a), (s - b) and (s - c)$ is $30 {cm}^{3}$ , where $s = a + b + c$ . then area of triangle is equal to

50% studentsanswered this correctly

Important Questions on Heron's Formula

MEDIUM

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 23

In an equilateral triangle of side

' a'

, the length of altitude will be

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 24

The area of an equilateral triangle of side

2 a cm

is

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 25

In Heron's formula

' 2 S'

stand for

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 26

The difference between the semi-perimeter and the sides of a

△ A B C

are

5 cm, 7 cm and 8 cm

respectively. The area of the triangle is

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>MULTIPLE CHOICE QUESTIONS>Q 27

The perimeter of an equilateral triangle is equal to the perimeter of a square. The diagonal to the square is

9 \sqrt{2} cm

. The area of equilateral triangle is

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>TEST YOURSELF>Q 1

If the area of a triangle is

k \sqrt{30} {cm}^{2}

, two sides of which are

8 c m

and

11 c m

and its perimeter is

32 c m

. Find the value of

k

.

MEDIUM

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>TEST YOURSELF>Q 2

Find the area of a quadrilateral

A B C D

in which

A B = 9 m, B C = 40 m, C D = 15 m, ∠ B = 90 °

and

D A = 28 m

.

EASY

9th CBSE

IMPORTANT

MATHEMATICS>Chapter 12 - Heron's Formula>TEST YOURSELF>Q 3

The adjacent sides of a parallelogram are

36 c m

and

27 c m

in length. If the distance between the shorter sides is

12 c m

. If the distance between the longer sides is

h cm

, find the value of

h

.