solve the question seen in the attachment
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Statements:
AM=AM(common)
BM=MC (M is the mid point of BC divides)
AB=AC (given)
Triangle ABM is congruent to triangle ACM (by SSS rule of congurency)
angle CAM=angle BAM(cpct)
angle CAM=25°
angle ABM=angle ACM(cpct)
angle ABM=65°
Now,In triangle AMC
angle M=90°(AM perpendicular to BC)
angle A+angle M+angle C=180(Sum of angles of a triangle=180°)
25°+angle M+65=180
angle M+90=180
angle M=180-90
angle M=90°
Angle AMC=90° Answer.
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