Same base, same height
PSLE Q17: find the area of triangle CDG
Options: (1) 18 cm² (2) 30 cm² (3) 36 cm² (4) 60 cm²
A
B
C
D
E
F
G
10 cm
not needed
6 cm
6 cm
6 cm
6 cm
height 6 cm
½
½
Base CD
?
Height
?
Area
?
Step 1 of 6
Model working
Base CD = 6 cm, height = 6 cm
Area of triangle CDG = ½ × base × height
= ½ × 6 × 6
= 18 cm²
Check: CDG and CDF have the same base CD and the same height, so their areas are equal.
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