10. Perimeter dan luas Matematik Tingkatan 1

$$\frac{1}{2}\times a\times b$$

$$\frac{1}{2}\times d\times b$$

$$\frac{1}{2}\times d\times e$$

$$\frac{1}{2}\times c\times b$$

BENAR

PALSU

15 cm²

30 cm²

11 cm²

9 cm²

12 cm ²

24 cm ²

80 cm ²

144 cm ²

40 cm²

48 cm²

96 cm²

$$14cm\ \times10cm$$

$$\frac{1}{2}\times14cm\times5cm$$

$$\frac{1}{2}\times14cm\times10cm$$

8 + 5 + 4 + 5 = 22 cm

8 + 5 + 4 + 5 + 3 = 25 cm

$$\frac{1}{2}\times\left(8+4\right)\times3\ =\ 18\ cm^2$$

$$\frac{1}{2}\times\left(8+4\right)\times5\ =\ 30\ cm^2$$