Hitunglah luas daerah yang diarsir dari bangun datar-bangun datar dibawah ini!
mohon bantuannya
Pramudya1000
A. 3,14 X 5 X 5 X 1/4 = 19,625 cm2 b. (20 X 14) + (22/7 X 7 X 7 X1/2) = 280 + 77 = 357 cm2 c. (10 X 10) - (3,14 X 10 X 10 X 1/4) = 100 - 78,5 = 21,5 cm2 d. (20 X 20) - (3,14 X 10 X 10) = 400 - 314 = 86 cm2 e. (22/7 X 7 X 7 X 1/2) - (22/7 X 3,5 X 3,5) = 77 - 38,5 = 38,5 cm2
b. (20 X 14) + (22/7 X 7 X 7 X1/2)
= 280 + 77
= 357 cm2
c. (10 X 10) - (3,14 X 10 X 10 X 1/4)
= 100 - 78,5
= 21,5 cm2
d. (20 X 20) - (3,14 X 10 X 10)
= 400 - 314
= 86 cm2
e. (22/7 X 7 X 7 X 1/2) - (22/7 X 3,5 X 3,5)
= 77 - 38,5
= 38,5 cm2
= × 3,14 ×
= × 3,14 × 25
=
= 19, 625
2. L = r^{2} [/tex] + p × l
= × × 7^{2} [/tex] + 20 × 14
= × 49 + 280
= 11 × 7 + 280
= 77 + 280
= 357 cm^{2} [/tex]
3. L = s^{2} [/tex] -
= 10^{2} [/tex] - × 3,14 ×
= 100 -
= 100 - 19,625
= 21,5 cm^{2} [/tex]
4. L = s^{2} [/tex] -
= 20^{2} [/tex] - 3,14
= 400 - 314
= 86
5. L = r^{2} [/tex] -
= × × 7^{2} [/tex] - × 3,5^{2} [/tex]
= × 49 - × 12,25
= 11× 7 - 22 × 1,75
= 77 - 38,5
= 38,5