Question

2
2
3. Find the measure of each of the angles marked
with a letter in each of the following diagrams
(see Fig. 11.13). Equal sides are marked by
dash and parallel sides are marked by arrows.
(a)
(b)
А
A
b
7. I
B В
•C С
B В
(c)
(d)
P
P
L
220°
110°
N
d
d 3000 R
R
f
(e)
389
डे 350
-В
K
L
M
с
8. I
d
DE
S
61°
100
75°
27°
9. F
a а
Fig. 11.13​

Answer 1

Answer:

We know that the exterior angle of a triangle is equal to the sum of the interior opposite angles.

Therefore

In a given triangle,

Ext.∠80∘=x+30∘

⇒x=80∘−30∘=50∘

⇒x=50∘



Answer ByManan Darda Dw20

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