Page 33 - NUMINO_WB_5B
P. 33
120-B2-1
Measure of a Missing Angle in a Quadrilateral
1. Use the following fact to find the measure of the unknown angle.
Example a. b.
a 40
The sum of the interior 170 a
angles of a quadrilateral is 60 70
360°.
100 a
80 70
c. d. e. 100
110 a 100 80
70 a
a 70 110
80
f. g. h.
a 125
85 65 70 a 150 30
105 80
30 a
Measure of a Missing Angle in a Quadrilateral
1. Use the following fact to find the measure of the unknown angle.
Example a. b.
a 40
The sum of the interior 170 a
angles of a quadrilateral is 60 70
360°.
100 a
80 70
c. d. e. 100
110 a 100 80
70 a
a 70 110
80
f. g. h.
a 125
85 65 70 a 150 30
105 80
30 a
