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1. Luas Persegi
= S.S
= 8.8
= 64

2. Luas Persegi Panjang
= P. L
= 12.7
= 84

3. Luas Segitiga
= 1/2. A. T
= 1/2. 11. 6
= 33

4. Luas Trapesium
= ( Sisi Atas + Bawah) . T. 1/2
= (7 + 15) . 6. 1/2
= 66

5. Luas Jajar Genjang
= a. t
= 8. 13
= 104

6. Luas Belah Ketupat
= d1. d2. 1/2
= 16. 20. 1/2
= 160

7. Luas Layang Layang
= d1. d2. 1/2
= 15. 26. 1/2
= 195

8. Luas Lingkaran
= π r²
= 22/7. 21. 21
= 1386

9. Luas Persegi = 225
Jadi
225 = s²
15 = s

10. Luas Segitiga = 84cm² dan tinggi 14cm

84 = 1/2. 14. Alas
84 = 7alas (dibagi 7 menjadi)
12 = alas
Jadi alasnya 12cm

1. L = s × s = 8×8 = 64 cm²

2. L = p × l = 12×7 = 84 cm²

3. L = ½.a × t = ½×11×6 = 33 cm²

4. L = ½ (a+c) t = ½ (7+15)×6 = 36 cm²

5. L = a × t = 8×13 = 104 cm²

6. L = ½×diagonal 1 × diagonal 2
L = ½×16×20 = 160 cm²

7. L = ½×diagonal 1 × diagonal 2
L = ½×15×26 = 195 cm²

8. L = π.r² = 22/7 ×21×21 = 1.386 cm²

9. L = s²
s = √L
s = √225 = 15 cm

10. L = ½.a × t
a = L /(½×t)
a = 84/(½×14)
a = 84/7 = 12 cm