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3 years ago

PLEASEEEE ASAP I NEED HELP Drag the tiles to the correct boxes to complete the pairs.

Mathematics

1 answer:

Ostrovityanka [42]3 years ago

4 0

Answer:

in order to right to left

Step-by-step explanation:

4th

3rd

2nd

1st

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Which set of angles are complementary

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A. <ECF and <BCF

Step-by-step explanation:

Complementary angles are angles that add up to give 90°

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1 year ago

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Suppose that the area between a pair of concentric circles is 49pi. Find the length of a chord in the larger circle that is tang

Lapatulllka [165]

Answer:

14 units

Step-by-step explanation:

We are given that the area between two concentric circles is $49\pi$

We have to find the length of chord in the larger circle that is tangent to the smaller circle.

Let $r_1,r_2$ be the radius of two circles.

$r_1$ be the radius of small circle and $r_2$ be the radius of large circle

We know that area pf circle= $\pi r^2$

Area of large circle = $\pi r^2_2$

Area of small circle = $\pi r^2_1$

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Area of large circle -Area of small circle= $49\pi$

$\pi r^2_2-\pi r^2_1=49\pi$

$\pi(r^2_2-r^2_1)=49$

By pythagorus theorem

$AD^2=OA^2-OD^2$

$AD^2=r^2_2-r^2_1$

$AD=49$

$AD=\sqrt{49}=7$

Length of chord= $2\cdot AD$

Hence, the length of chord of the larger circle = $2\cdot7=14$ units

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