Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 11

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9th ICSE

IMPORTANT

Earn 100

Find the area of an isosceles triangle whose equal sides are $12 cm$ each and the perimeter is $30 cm$ .

Important Questions on Mensuration

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 12

Find the area of an isosceles triangle whose base is

6 cm

and perimeter is

16 cm

.

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 13

The side of right- angled triangle containing the right angle are

5 x cm and (3 x - 1) cm

. Calculate the length of the hypotenuse of the triangle if its area is

60 {cm}^{2}

.

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 14

In

∆ A B C

,

∠ B = 90 °

,

A B = (2 x + 1) cm and B C = (x + 1) cm

. If the area of

∆ A B C

is

60 {cm}^{2}

, find its perimeter.

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 15

If the perimeter of a righted angled triangle is

60 cm

and its hypotenuse is

25 cm

, find its area.

EASY

9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 16

The perimeter of an isosceles triangle is

40 cm

. The base is two-third of the sum of equal sides. Find the length of each side.

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IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 17

If the area of an isosceles triangle is

60 {cm}^{2}

and the length of each of its equal sides is

13 cm

, find its base.

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 18

The base of a triangular field is

3

times its height. If cost of cultivating the field at the rate of

₹ 25

per

100 m^{2}

is

₹ 60000

. Find its base and height.

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9th ICSE

IMPORTANT

Understanding ICSE Mathematics Class 9>Chapter 16 - Mensuration>EXERCISE 16.1>Q 19

A triangular park $A B C$ has sides $120 m, 80 m and 50 m$ . A gardner Dhania has to put a fence around it and also plant grass inside. How much area does she need to plant? Find the cost of fencing it with barbed wire at the rate of $₹ 20$ per meter leaving a space $3 m$ wide for a gate on one side .