The vertices of a triangle abc are a(7, 5), b(4, 2), and c(9, 2). what is measure of angle abc? 30° 45° 56.31° 78.69°

The measure of angle ABC is 45°

Explanation

Vertices of the triangle are:   A(7, 5), B(4, 2), and C(9, 2)

According to the diagram below....

Length of the side BC (a)

Length of the side AC (b)

Length of the side AB (c)

We need to find ∠ABC or ∠B . So using Cosine rule, we will get...

So, the measure of angle ABC is 45°

45

Step-by-step explanation:

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