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GenaCL600 [577]
3 years ago
10

What is the value of A to the nearest tenth? (geometry)

Mathematics
2 answers:
joja [24]3 years ago
8 0

Answer:

A. 12.9

Step-by-step explanation:

We have been given a circle and we are asked to find the measure of segment 'a'.

We will use intersecting chords theorem to solve our given problem. This theorem states that when two chords intersect inside a circle, then product of segments on each chord are equal.

Using above theorem, we can set an equation as:

a\cdot 35=15\cdot 30  

Dividing both sides by 35, we get

\frac{a\cdot 35}{35}=\frac{15\cdot 30}{35}

a=\frac{15\cdot 6}{7}

a=\frac{90}{7}

a=12.857142857\approx 12.9

Therefore, the value of 'a' is 12.9 and option A is the correct choice.

netineya [11]3 years ago
5 0
It's about 12.9 . When two chords intersect, the products of the segments are equal. So (15 x 30) = 35a .
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adell [148]

For this case we have to represent the following expression algebraically:

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melomori [17]

Answer: D

Step-by-step explanation:

7 0
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I genuinely have no clue how to do them<br>15 here and 15 on another post​
Dovator [93]

Step-by-step explanation:

6. angle 1 = angle 4 = 60deg (vertically opposite angles)

7. angle 3 = 180 - 40 - 60 = 80deg (angles on a straight line are supplementary)

8. angle 5 = angle 2 = 40deg (vertically opposite angles)

9. angle 6 = angle 3 = 80deg (vertically opposite angles)

10. angle 7 = angle 5 + angle 4 = 40 + 60 = 100deg (alternate angles, //lines)

11. angle 8 = 180 - 100 = 80deg (angles on a str line are supplementary)

12. angle 9 = 180 - 80 - 40 = 60deg (angles in a triangle)

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14. angle 11 = angle 9 = 60deg (vertically opp angles)

15. angle 12 = angle 10 = 120deg (vertically opp angles)

Topic: angles

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