Page 261 - NUMINO_WB_6B
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125_G6U27_WB˜ ˙—» ¿º 2011.6.23 3:44 PM ˘ ` 15
125-P1-1
Use of the Angles of Triangles
Find the difference between angle b and a.
A
D
b
30 45 a
B C
Step 1. Express angle BCD as an algebraic expression by using angle a.
Step 2. The sum of the interior angles of triangle BCD is 180 . Make an equation
using a and b.
Step 3. What is the difference between the two angles?
125-P1-1
Use of the Angles of Triangles
Find the difference between angle b and a.
A
D
b
30 45 a
B C
Step 1. Express angle BCD as an algebraic expression by using angle a.
Step 2. The sum of the interior angles of triangle BCD is 180 . Make an equation
using a and b.
Step 3. What is the difference between the two angles?
