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3 years ago

14

I don't really understand, please help!!

2 answers:

aivan3 [116]3 years ago

7 0

Step-by-step explanation:

In Triangle ICU,

Angle 2 = 180° - Angle 1 (Angles on a straight line)

CR = CU - RU

In Triangle ISR,

Angle 3 = 180° - Angle 4(Angles on a straight line)

SU = RS - RU

Angle 1 = Angle 4

Therefore, Angle 2 is equal to Angle 3

CU = RS

Therefore, CR is equal to SU

Triangle ICR and Triangle ISU

IC = IS

Angle 2 = Angle 3

CR = SU

Therefore, Triangle ICR and Triangle ISU are congruent (SAS congruency).

As the two triangles are congruent, Angle CIR = Angle SIU

miv72 [106K]3 years ago

4 0

Step-by-step explanation:

the proof is given above

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Prove that 1/sin^2A -1/tan^2A= 1

Vika [28.1K]

Answer:

Step-by-step explanation:

$LHS =\dfrac{1}{Sin^{2} \ A }-\dfrac{1}{Tan^{2} \ A }\\\\\\ = \dfrac{1}{sin^{2} \ A}- \dfrac{1}{\dfrac{Sin^{2} \ A}{Cos^{2} \ A}}\\\\\\= \dfrac{1}{sin^{2} \ A } - \dfrac{Cos^{2} \ A}{Sin^{2} \ A}\\\\\\= \dfrac{1-Cos^{2} \ A}{Sin^{2} \ A}\\\\\\= \dfrac{Sin^{2} \ A}{Sin^{2} \ A}\\\\\\= 1 = \ RHS$

Hint: 1 - Cos² A = Sin² A

4 0

2 years ago

Amelia makes necklaces using beads and wire. She starts with 6 feet of wire. How many necklaces can she make?

navik [9.2K]

If Amelia starts with 6 feet of wire, the amount of necklaces that she can make is 18.

<h3>What is the necklaces about?</h3>

Jewelry wire is known to be a kind of a wire that can be either a copper, brass, or others that are often used in jewelry making.

Note that Wire is seen today as a single unit, and it is also seen to be cylindrical, elongated part of drawn metal.

Using the table:

6 ÷ 1/3

= 6 x 3

= 18

Therefore, If Amelia starts with 6 feet of wire, the amount of necklaces that she can make is 18.

Therefore, option A is correct.

Learn more about Wiring from

brainly.com/question/14792853

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8 0

1 year ago

What is the value of x?

Nesterboy [21]

This is a special 60-30-90 triangle, and the angle measure of x is $4 \sqrt{3} .$

8 0

3 years ago

Read 2 more answers

Expand then simplify: 12(2p-3)

avanturin [10]

Answer:

expanding ends in the simplest form: 24p-36

Step-by-step explanation:

7 0

3 years ago

Can someone help me out

GalinKa [24]

Elaine's, line up your decimal and add zeros.

7 0

3 years ago