Question

in the given image if
BCDE is a square,
then what is the area
of the biggest
rectangle in cm.
5 cm
​

Answer 1

Answer:

Area is 25 cm²

Step-by-step explanation:

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Answer 2

Answer:

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8th

Maths

Mensuration

Introduction to Mensuration

Two rectangles ABCD and DBE...

MATHS

Two rectangles ABCD and DBEF are as shown in the figure. The area of rectangle DBEF (in square units) is _______.

A

10

B

12

C

14

D

15

EASY

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ANSWER

From the figure given, △ADB forms a right angled triangle.

We know that square of hypotenuse of a triangle is equal to sum of squares of adjacent sides.

⇒(BD)2=(AB)2+(AD)2

⇒(BD)2=(4)2+(3)2=25

⇒BD=25=5

Consider △BCD,

Area of △BCD =21×BC×CD=21×BD×CG

⇒BD∗CG=BC∗CD    ............(i)

Area of rectangle BDFE=BD×FE=BD×CG=BC

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Step-by-step explanation:

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