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Vitek1552 [10]
3 years ago
8

This is a similar triangle please find the missing length. (?)

Mathematics
1 answer:
stira [4]3 years ago
3 0

Answer:

10

Step-by-step explanation:

Set up as a proportion:

\frac{QR}{QP}=\frac{BA}{BC}, insert given values

\frac{?}{12}=\frac{30}{36}, cross multiple

36*?=30*12

36*?=360, divide both sides by 36 to get the missing side (?) by itself

?=10

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4 years ago
49 ÷ 43 = sorry guys about the bad question its actually 4 to the 9th power divided by 4 to the third power
zalisa [80]
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5 0
3 years ago
In ΔBCD, \overline{BD} BD is extended through point D to point E, \text{m}\angle CDE = (9x-12)^{\circ}m∠CDE=(9x−12) ∘ , \text{m}
UNO [17]

Answer:

Angle BCD is 13 degrees

Step-by-step explanation:

Here, we want to find the measure of angle BCD

To get this, we need an appropriate diagram. The diagram can be seen in the attachment.

To find the value of BCD, we can use an important triangle theorem.

This is that the sum of opposite interior angles of a triangle equals the exterior angle.

Thus, we have that;

BCD + DBC = CDE

hence;

3x + 5 + 2x + 3 = 9x-12

5x + 8 = 9x -12

9x-5x = 8 + 12

4x = 20

x = 20/4

x = 5

So the measure of BCD will be 2(5) + 3 = 10 + 3 = 13

8 0
3 years ago
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Ostrovityanka [42]
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3 years ago
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