Luas segitiga PQR adalah ......
a. 21 cm²
b. 30 cm²
c. 35 cm²
d. 50 cm²
a. 21 cm²
b. 30 cm²
c. 35 cm²
d. 50 cm²
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PENYELESAIAN
L. PQR = 1/2 × a × t
= 1/2 × 15 × 4
= 15 × 2
= 30 cm² Opsi B