tolong bantu mat saya kesusahan
Jawab:
segitiga siku
pythagoras
gambar a
x² = 4²+7²= 16 +49 = 65
x = √65
gambar b
x² = √38 ²+ √11² = 38 + 11 = 49
x = √49
x = 7
gambar c
( x+ 4)² = x² + 16²
x² + 8x + 16 = x² + 256
8x = 240
x = 30
gambar d
x²+ (3√7)² = 12²
x² + 63= 144
x² = 81
x = 9
