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Self Practice 9.3b
1. 2. C
B y
S R
A
115° 118° 84° x 96° D
68° x E
P Q T F
In the diagram, PQT is a straight In the diagram, ABC and DEF are straight
line. Calculate the value of x. lines. Calculate the values of x and y.
How do you solve problems involving LEARNING
quadrilaterals? STANDARDS
Solve problems
6 involving quadrilaterals.
P U
V T
y x S
72°
Q R
CHAPTER
In the diagram, PQRU is a square and QRSV is a parallelogram.
9
PVR is a straight line. Find the values of x and y.
An architect uses the
knowledge of polygons
∠PQR = 90° dan PQ = QR to design a building.
90°
Thus, ∠QRV =
2
x = 45° x = ∠QRV
∠ QVS + 72° = 180° V S
∠ QVS = 180° – 72° x 72°
= 108°
Therefore, ∠QVR + x = 108°
∠QVR = 108° – 45° Q R
= 63°
Hence, y = 180° – 63°
= 117°
216
Chapter 9
09 TB Math F1.indd 216 11/10/16 12:18 PM
