tolong jawab untuk besok jangan asalan pakai cara hanya untuk ahli matwmatika (yang serius,dan udah mempelajari) tolong ya teman

PQ = 2 x MQ
Luas = π . (MQ)²

1.
PQ = 2 x 5 dm = 10 dm
Luas = 3,14 x 5² = 3,14 x 25 = 78,5 dm²

2.
PQ = 2 x 8 dm = 16 dm
Luas = 3,14 x 8² = 3,14 x 64 = 200,96 dm²

3.
PQ = 2 x 14 cm = 28 cm
Luas = 22/7 x 14² = 22/7 x 196 = 616 cm²

4.
PQ = 1/2 x 35 cm = 17,5 cm
Luas = 22/7 x 17,5 x 17,5 = 22 x 2,5 x 17,5 = 962,5 cm²

5.
MQ = 1/2 x 9 dm = 4,5 dm
Luas = 3,14 x 4,5² = 3,14 x 20,25 = 63,585 dm²

6.
MQ = 1/2 x 42 cm = 21 cm
Luas = 22/7 x 21 x 21 = 22 x 3 x 21 = 1.386 cm²

7.
Luas = 22/7 x MQ²
1.386 = 22/7 x MQ²
MQ² = 1386 x 7/22
MQ² = 441
MQ = √441
MQ = 21 cm

PQ = 2 x MQ = 2 x 21 = 42 cm

8.
Luas = 3,14 x MQ²
628 = 3,14 x MQ²
MQ² = 628 : 3,14
MQ² = 200
MQ = √200
MQ = √(100 x 2)
MQ = 10√2 dm

PQ = 2 x 10√2 = 20√2 dm

9.
Luas = 22/7 x MQ²
3850 = 22/7 x MQ²
MQ² = 3850 x 7/22
MQ² = 1.225
MQ = √1.225
MQ = 35 cm

PQ = 2 x MQ = 2 x 35 = 70 cm

10.
Luas = 3,14 x MQ²
1017,36 = 3,14 x MQ²
MQ² = 1017,36 : 3,14
MQ² = 324
MQ = √324
MQ = 18 cm

PQ = 2 x 18 = 36 cm