2 years ago

Which statements are true select each correct answer

Mathematics

1 answer:

alexandr1967 [171]2 years ago

4 0

The first and the second one are true statements.

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PLZ HELP

Alex

Answer:

The correct option is C ) 109.5°

Therefore,

$m\angle E=109.5\°$

Step-by-step explanation:

Given:

In Triangle DEF

d = 10

e = 18

f = 12

To Find

angle E = ?

Solution:

In Triangle DEF , Cosine Rule says

$\cos E=\dfrac{f^{2}+d^{2}-e^{2}}{2fd}$

Substituting the values we get

$\cos E=\dfrac{12^{2}+10^{2}-18^{2}}{2\times 12\times 10}$

$\cos E=\dfrac{-80}{240}=-\dfrac{1}{3}$

Therefore,

$\angle E=\cos^{-1}(-0.3333)$

$m\angle E=109.5\°$ ............As it is in Second Quadrant

Therefore,

$m\angle E=109.5\°$

4 0

3 years ago

Judy paid $120.96 for carpet for her room that is 144 ft.² Nathan like the carpet she chose but he wasn't sure it would match th

Annette [7]

Answer:

$0.84

Step-by-step explanation:

120.96/144= 0.84

3 0

3 years ago

EASY 50 POINTS <br><br><br>Which statement is not a step used when constructing an inscribed square?

Damm [24]

the answer is B, hope this helps

3 0

2 years ago

Read 2 more answers

An example of a rectangular Prism can be: A globe or ball O Fish tank o Bowl Can

garik1379 [7]

Answer:

Fish Tank

Step-by-step explanation:

This of a rectangular prism as a cardboard box. It has rectangles on the top and the bottom. The fish tank is somewhat similar to this so it will be a rectangular prism.

3 0

3 years ago

N/8 +12 =64 solve for N.

anastassius [24]

Answer:

n divided by 8 Plus 12 = 64 n=416

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Which statements are true select each correct answer​

Which statements are true select each correct answer