xþxþx 6 ¼ 24
3 x 6 ¼ 24
3 x 6 þ 6 ¼ 24 þ 6
3 x¼ 30
31 x
31
¼
30
3
x¼ 10
x 6 ¼ 4
The lengths of the sides are 10 inches, 10 inches, and 4 inches.
3 : Letx¼the width of the rectangle
and 2x 10 ¼the length of the rectangle
P¼ 2 lþ 2 w
52 ¼ 2 ð 2 x 10 Þþ 2 x
52 ¼ 4 x 20 þ 2 x
52 ¼ 6 x 20
52 þ 20 ¼ 6 x 20 þ 20
72 ¼ 6 x
72
6
¼
61 x
61
12 inches¼x
2 x 10 ¼ 2 ð 12 Þ 10 ¼14 inches
The length is 14 inches and the width is 12 inches.
4 : Letx¼the measure of one angle
2 x¼the measure of the second angle
2 x 20 ¼the measure of the third angle
LESSON 20 Word Problems in Geometry 247