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Priya makes a triangular kite. The exterior angle at the tail vertex is 150°. The two interior opposite angles are such that one is twice the other plus 30°. Find the smaller of the two interior opposite angles.

Class 7Exterior Angle PropertyTriangles
  • A44
  • B36
  • C40
  • D80

Step-by-Step Solution

Let smaller = s, larger = 2s + 30. Sum = exterior: s + 2s + 30 = 150, 3s = 120, s = 40°.
Answer: C) 40

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