In an isosceles triangle MKN with base MK, apex angle N = 70 ° find the base angles.

The angles of any triangle add up to 180 degrees.
M + K + N = 180
M + K = 180 – N
M + K = 180-70
M + K = 110 – the sum of the angles at the base in degrees.
Since the triangle is isosceles with base MK, the angles M and K are equal.
M = K = 110/2 = 55 degrees.
Answer: 55 degrees.

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