1.

In the figure given alongside, find the measure of ∠ACD.

Answer»

In the given figure, side BC of ΔABC is produced to D.

Consider the ΔABC,

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

∴ ∠ACD = ∠ABC + ∠BAC

∠ACD = 45o + 75o

∠ACD = 120o

Hence, the measures of ∠ACD is 120o.



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