Question

pakai cara penyelesaian ya kak ​

Answer 1

Verified answer

Jawaban:

no 6

AC = √10²+24²

=√200+576

= √676 = 26

kll =AC +AB +BC

= 26+10+24

=60 CM

JADI JWABN NYA D

Answer 2

Pythagoras

6. Cari AC dengan pythagoras.

AC = √(AB² + BC²) = √(10² + 24²) = √(100 + 576) = √676 = 26 cm

Keliling ΔABC = AB + BC + AC

= 10 + 24 + 26

= 60 cm  [D.]

7. AB² = BC² - AC²

(2x + 1)(2x + 1) = 5² - 4²

4x² + 4x + 1 = 25 - 16

4x² + 4x + 1 = 9

4x² + 4x + 1 - 9 = 0

4x² + 4x - 8 = 0     →     kedua ruas dibagi 4

x² + x - 2 = 0

(x - 1)(x + 2) = 0

x - 1 = 0    atau    x + 2 = 0

x = 1     atau     x = -2

Jadi, nilai x adalah 1  [A.].

8. a² = 10,4² - 9,6²

a = √(10,4² - 9,6²) = √(108,16 - 92,16) = √16 = 4 cm  [D.]

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