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masya89 [10]
4 years ago
15

Can you help me with this question?

Mathematics
1 answer:
Rufina [12.5K]4 years ago
4 0

Answer:

  16.2

Step-by-step explanation:

The angle internal to the triangle at B is the supplement of the one shown, so is 65°. That is equal to the angle internal to the triangle at D. Since the vertical angles at C are congruent, the two triangles are similar by the AA theorem.

Corresponding sides of similar triangles are proportional, so we can write the proportion shown in the attachment:

  BC/FC = DC/AC

  BC = FC(DC/AC) = 21.6(7.2/9.6)

  BC = 16.2 . . . . matches the first choice

You might be interested in
So like imma ask dis one more time
zysi [14]

Answer:

1/4+1/32

Step-by-step explanation:

1/4+1/4=1/2

1/32+1/32=1/16

I hope this helps:

7 0
3 years ago
Which statement is sometimes true:
Lelu [443]

Answer:

4. A rectangle is a square

Step-by-step explanation:

A rectangle can be a square, but not always. A rectangle has 2 pairs of parallel sides, 2 pairs of congruent sides, and 4 right angles. Squares have 2 pairs of parallel sides, 4 congruent sides, and 4 right angles. So, the difference between the two is that adjacent sides are not necessarily congruent in rectangles, but they are in squares. This means that some rectangles can be a square. If a rectangle has all congruent sides, then it is a square. On the other hand, some rectangles do not have all congruent sides, and thus are not squares.

6 0
2 years ago
Calculate the perimeter -math
Flauer [41]
That's easy

alrighty
we can see that each of those curves from K to N and from N to L are just 1/4 of the circumference of the circle
the circles have centers at J and M

so

we have 2 of those 1/4 circumfernce so a total of 2/4 or 1/2 circumference

circumference=2 times pi times radius
radius=JK=JN=NM=ML=7
we want half so
perimiter=1/2 times 2 times pi times 7
we are given pi=22/7 so
perimiter=1/2 times 2 times 22/7 times 7
perimiter=2/2 times 22
permiter=22cm

the perimiter is 22

wait, I forgot abou the bottom part (KL)
that's just twice the radius or 2*7=14
22+14=36
the perimiter is 36cm
7 0
3 years ago
What’s the area of this shape
sergeinik [125]

The shape at the top is a trapezoid with width 2 cm and lengths 4 and 8 cm.

Its area is


4+8

-------- 2 cm = 12 cm^2

2


The lower part consists of two congruent triangles. The area of a triangle is

A = (1/2)(b)(h). Here, A = (1/2) (4)(5.75) = 11.5, so the area of both triangles is 23 cm^2.


Thus, the total area is (12+23) cm^2, or 35 cm^2.

3 0
4 years ago
Read 2 more answers
630 + 0 is greater than or is is less than630​
grigory [225]

Answer:

630+0 is 630. So 630 is equal to 630.

6 0
3 years ago
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