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Book: M.L Aggarwal [Pg-364, Question:18]
Class:9
Question 1:
The length and the breadth of a rectangle are 12 cm and 9 cm respectively.Find the height of a triangle whose base is 9 cm and whose area is one-third that of rectangle.
Answers
Answered by
1
=> Area of rectangle = Length × Breadth
Length = 12 cm
Breadth = 9cm
12cm×9cm = 180cm²
=> area of triangle = 1/3 of the area of rectangle
=1/3 ×180 = 36cm²
area of triangle = 1/2 base × height
36=1/2×9×height
Height = 8 cm
Answered by
1
Area of rectangle=length*breadth
= = 12 * 9 = 108 cm?
Area of triangle=1/3 of area of
rectangle
=1/3 * 108 = 36cm2
Area of triangle=1/2 base × height
36 =1/2*9*height
height =8 cm (ans)
Step-by-step explanation:
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