BOOK -Understanding Mathematics class 7
Chapter 7.1 ka 9 ka (c)
PLEASE SOLVE IT
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BOOK -Understanding Mathematics class 7
Chapter 7.1 ka 9 ka (c)
PLEASE SOLVE IT
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Answer:
180-115 (linear pair)
x=65°
40+65=105
180-105(in triangle sum is 180°)
y=75°
Verified answer
given,
ABC is a triangle
∠ACD=115°
∠ABC=40°
angle sum property of the triangle states that-
the sum of interior angles of a triangle is 180°.
angle sum property of a line
the sum of the angles on a straight line is equal to 180°.
therefore,
∠x+∠ACD=180°
∠x+115°=180°
∠x=65°
∠x+∠y+∠ABC=180°(angle sum property of triangle)
∴ 65°+ ∠y+40°=180°
∠y=180°-105°
∠y=75°
∠x=65°
∠y=75°