
Concept explainers
To find: the value of x and y using mathematical connections.

Answer to Problem 51E
x=85 and y=65 .
Explanation of Solution
Given:
Concept used:
Exterior angle theorem:
The measurement of the exterior angle of a triangle is equal to the sum of the measurement of two nonadjacent interior angles.
Sum of the three angles of triangle is always 1800 .
Calculation:
According to the exterior angle theorem:
The measurement of the exterior angle of a triangle is equal to the sum of the measurement of two nonadjacent interior angles.
From given diagram it is clearly point out that:
900=250+y0.90=y+25.y=65. .
Similarly,
The measurement of the exterior angle of a triangle is equal to the sum of the measurement of two nonadjacent interior angles.
From given diagram it is clearly point out that the:
x0=20+y0.x=65+20.x=85.
Hence, x=85 and y=65 .
Chapter 12 Solutions
BIG IDEAS MATH Integrated Math 1: Student Edition 2016
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