In fig ABCD is a parallelogram. If ∠DAB = 60° and ∠DBC = 80° then ∠CDB is

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MCQ (Single)Angle Sum Property of TriangleOpposite Angles of Parallelogram are Equal

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In a forest, a big tree got broken due to heavy rain and wind, Due to this rain the big branches AB and AC with lengths 5 m fell down on the ground. Branch AC makes an angle of 30° with the main tree AP. The distance of Point B from P is 4 m. You can observe that △ABP is congruent to △ACP.

CASE_STUDIESAngle Sum Property of TriangleCongruence of TrianglesRHS Congruence Rule for Right Triangles

△ABC is an isosceles triangle in which AB = AC. Side BA is produced to D such that AD = AB (see Fig. 7.34). Show that ∠ BCD is a right angle.

TextAngle Sum Property of TriangleIsosceles Triangle Property of Equal Angles