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stich3 [128]
3 years ago
15

GEOMETRY NEED HELP ASAP WILL ASSIGN BRAINLIEST!!!

Mathematics
1 answer:
umka2103 [35]3 years ago
4 0
Answer:
DE = 31 in

Explanation:
The sum of angles of a triangle is 180
This means that:
measure angle D + measure angle E + measure angle F = 180
43 + 62 + measure angle F = 180
measure angle F = 75 degrees

To answer this question, we will use the sine rule (attached in the image)
In case of triangle DEF, the sine rule that we will use will be as follows:
\frac{sin D}{EF} = \frac{sin F}{DE}

We have:
measure angle D = 43 degrees
EF = 22 in
measure angle F = 75 degrees
DE is the length we want to find

Substitute in the above formula to get DE as follows:
\frac{sin 43}{22} = \frac{sin 75}{DE}

DE = 31.1 which is approximately 31 in

Hope this helps :)

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What is m pqr? <br> Please helps
LiRa [457]

Answer:

134 degrees

Step-by-step explanation:

Line PQS is 180 degrees. That being said, the addition of <PQR and <SQR equal 180 degrees.

Now you need to set up an equation to find out what angle PQR is. Since there is an X, you need to solve for X. The equation looks like this:

(3x+5) + (x+3) = 180

<u>Solve for x</u>

(3x+5) + (x+3) = 180\\4x+8=180\\4x=172\\x=43

Now plug in 43 where you see x. For this question, you only need to focus on (3x+5)

3(43) + 5 = 134

m<PQR = 134°

Do this every, single, time when you see these questions. Remember that line PQS is 180 degrees, and both of those angles are equal to 180 degrees.

If you want to check if this is true, plug in 43 into our equation we made to see if it equals 180 degrees. <em>If it doesn't equal 180, your equation is incorrect.</em>

<em />

3(43)+5+43+3 = 180

134 + 46 = 180

180 = 180 ✅

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Answer:

x = 72

Step-by-step explanation:

These angles are complementary so they add up to 90:

x + 18 = 90

x = 90 - 18

x = 72

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