B.
Find its perin
5. Find the perimeters of (1) AABE (ii) the rectangle BCDE in this
figure. Whose perimeter is greater?
em
زر
6
frame Thenicture is 7
cm wide
Answers
Answered by
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Answer.
MATHS
Find the perimeters of
(i) △ABE
(ii) the rectangle BCED in this figure, Whose perimeter is greater?
question
ANSWER
Given AB=
2
5
cm,BE=
4
11
cm,AE=
5
18
cm,DE=
6
7
cm
(i) perimeter of ΔABE=AB+BE+AE
=
2
5
+
4
11
+
5
18
LCM(2,4,5)=20=
20
5×10+11×5+18
=
20
50+55+18
=
20
123
= 6.15 cm
(ii) Perimeter of rectangle BCED
= 2(BC+CD)
=2(BC+CD)
= BC+CD+DE+EB
= DE+BE+DE+BE
Since opposite sides are equal
= 2(DE+BE)
=2(
6
7
+
4
11
)
=
24
2
(28+66)
=
12
1
×94=
12
94
=7.833
= 7.833 cm
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