Math, asked by sawrajusaw5, 5 months ago

In the given figure, ABAC is a right angled
triangle at A. If AE: EC = 1:2, AF: FB = 1:2
and 9(BE? + CF2) is equal to k. BC?, then the
unit digit of K2 will be
दिये गये चित्र में ABAC, A पर एक समकोण त्रिभुज है। यदि
AE: EC = 1 : 2, AF: FB = 1 : 2 तथा 9(BE + CFP)
का मान k- BC है, तब का इकाई अंक होगा
B
c
E​

Answers

Answered by arshgill0963
5

Answer:

Given ∠B=90

,AB=28cm,BC=21cm

Area of shaded region=ar△ABC+area of semicircle AC-ar quarter circle BC

=

2

1

×BC×AB+

2

1

×π(

2

AC

)

2

4

1

×π(BC)

2

=[

2

1

×21×28]+[

2

1

×

7

22

×

4

1

(

28

2

+21

2

)

2

]−

4

1

×

7

22

×21×21

=294+[

28

11

×1225]−346.5

=294+481.25−346.5=428.75㎠

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