Answer:
12) 25π/3 cm² ≈ 26.18 cm²
13) C. 2π m²
Step-by-step explanation:
Area of a sector is:
A = πr² (θ / 360°)
where r is the radius of the circle, and θ is the angle of the sector.
12) The diameter is 20 cm, so the radius is 10 cm. The angle of each sector is 30°. So the area is:
A = π (10 cm)² (30° / 360°)
A = 25π/3 cm²
A ≈ 26.18 cm²
13) To find the area, first find the radius using Pythagorean theorem.
a² + b² = c²
r² + r² = (4 m)²
2r² = 16 m²
r² = 8 m²
So the area is:
A = π (8 m²) (90° / 360°)
A = 2π m²
Answer:the answer is b
Step-by-step explanation:
bc you multiply 1/2 and 5 first then you subtract 11 1/2 by 8
<span>=<span><span>(<span><span>4x</span>+<span>−5</span></span>)</span><span>(<span><span>3x</span>+2</span>)</span></span></span><span>=<span><span><span><span><span>(<span>4x</span>)</span><span>(<span>3x</span>)</span></span>+<span><span>(<span>4x</span>)</span><span>(2)</span></span></span>+<span><span>(<span>−5</span>)</span><span>(<span>3x</span>)</span></span></span>+<span><span>(<span>−5</span>)</span><span>(2)</span></span></span></span><span>=<span><span><span><span>12<span>x2</span></span>+<span>8x</span></span>−<span>15x</span></span>−10</span></span><span>=<span><span><span>12<span>x2</span></span>−<span>7x</span></span>−<span>10</span></span></span>