Question

class 7 maths 2 Geometry ​

Answer 1

Answer:

34 cm

Step-by-step explanation:

By drawing rectangle and its diagonal, and using Pythagorean theorem of right triangle,we know that

Length = 12 cm

Breadth = 5 cm

Thus ,Perimeter of the rectangle = 2(length+breadth)

= 2(12+5) =2(17) =34 cm

Answer 2

Answer:

A) 34 CM IS THE ANSWER

Step-by-step explanation:

HERE A RECTANGLE IS FORMED

EACH ANGLE OF A RECTANGLE IS 90°

WE NAME THE RECTANGLE AS ABCD

WE GET TWO TRIANGLES

H² = P² + B² ( BY PYTHAGORAS THEOREM )

13² = 5² + B²

169 = 25 + B²

169 - 25 = B²

144 = B²

B² = 144

B = √ 144

B = √ 12 × 12

B = 12 CM

SO, THE LENGTH OF RECTANGLE OR BASE OF TRIANGLE IS 12 CM

LENGTH OF RECTANGLE = 12 CM

BREADTH OR WIDTH OF RECTANGLE = 5 CM

PERIMETER OF RECTANGLE

2 ( L + B )

2 ( 5 + 12 )

2 ( 17 )

34 CM

IS THE ANSWER

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