Question

The vertices of a triangle are A(7,5), B(4,2), and C(9,2) what is measure angle ABC?
A: 30
B: 45
C: 56.31
D: 78.69

Answer 1

First draw 3 dots on the graph A,B,C.

Answer 2

Draw a triangle. you can find the length of the sides by using the distance formula
\[\rm d= \sqrt{(x_2 -x_1)^2+(y_2-y_1)^2}\]
And then you can use law of cosines to find the angle.

Answer 3

@rachelp