4 years ago

Help me answer these questions

Mathematics

1 answer:

Cerrena [4.2K]4 years ago

5 0

Answer:

Page # 1:

Diameter = 14 cm

Radius = 7 cm

Area of the circle = $\pi r^2$

=> (π)(7)²

=> 49π cm²

Page # 2:

Area of quarter circle = $\frac{\pi r^2 }{4}$

Where r = 8 cm

=> Area = $\frac{(\pi)(8)^2 }{4}$

=> Area = 16 π cm²

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16 + 15 = answer this yall

Gekata [30.6K]

Hi there!

Hope this helps you!

Final Result: 31

4 0

3 years ago

Choose the equation of a circle with radius 6 and center (2, -3).

Rufina [12.5K]

Answer: $(x-2)^2 + (y+3)^2 = 36\\\\$

Work Shown:

$(x-h)^2 + (y-k)^2 = r^2\\\\(x-2)^2 + (y-(-3))^2 = 6^2\\\\(x-2)^2 + (y+3)^2 = 36\\\\$

Note that (h,k) = (2,-3) is the center and r = 6 is the radius. The last line is not expanded out using the FOIL rule because its common practice to leave it in $(x-h)^2 + (y-k)^2 = r^2\\\\$ form. This form allows the reader to quickly determine the center and radius (rather than have to do a lot of algebraic steps before hand).