Question

11. The
ea of the following figures
of a 24 m lolla
lawn is 36 m, find its pe
12 Find the perimeter and area
(see Figure 23.11 (i)-(iv)].
(ii)
15 cm
4cm
12 cm
13 cm
4 cm
30
5 cm​

Answer 1

Answer:

In △ABC AB=AC

⇒∠B=∠C (Angles opposite to equal sides are equal)

Now using angle sum property

∠A+∠B+∠C=180

∘

⇒80

∘

+∠C+∠C=180

∘

⇒2∠C=180

∘

−80

∘

⇒∠C=

2

100

∘

=50

∘

now ∠C+∠x=180

∘

(Angles made on straight line (AC) are supplementary)

⇒50

∘

+∠x=180

∘

⇒∠x=180

∘

−50

∘

=130

∘

@ARSHkyu

insta@_arsh_deep_29