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3 years ago

4. An isosceles triangle has sides that measure 7cm and 15cm. Find the third side of the

Mathematics

1 answer:

Advocard [28]3 years ago

8 0

Answer:

Third side is 15cm. Perimeter is 37cm.

Step-by-step explanation:

In a triangle sum of two sides is always greater than third side. Two sides of a isosceles triangle are equal.

So if the third side is 7cm

7+7=14cm which is less than 15 cm.

hence third side is 15 cm as

15+15=30cm which is greater than 7cm

15+7=22cm which is greater than 12cm

then

perimeter=15+7+15=37cm

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4 years ago

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blondinia [14]

Hello!

<h3><em><u>Answers</u></em></h3>

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4 0

3 years ago

HELP!!!<br> 50 Points!!!!!

andreyandreev [35.5K]

Answer:

i think the first and last one.

Step-by-step explanation:

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2 years ago

A 15 ft. telephone pole has a wire that extends from the top of the pole to the ground. The wire and the ground form a 42° angle

Lorico [155]

Answer:

Correct choice is A

Step-by-step explanation:

Consider right triangle ABC formed by the telephone pole (side AB) and ground (side BC). In this triangle AC is the length of the wire, BC is the distance from the base of the pole to the spot where the wire touches the ground and AB=15 ft, ∠ACB=42°.

Then

$\sin 42^{\circ}=\dfrac{AB}{AC}\Rightarrow AC=\dfrac{AB}{\sin 42^{\circ}}=\dfrac{15}{\sin 42^{\circ}}\approx 22.4\ ft.$
$\tan 42^{\circ}=\dfrac{AB}{BC}\Rightarrow BC=\dfrac{AB}{\tan 42^{\circ}}=\dfrac{15}{\sin 42^{\circ}}\approx 16.7\ ft.$

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4 years ago

If the diagonal of a square is 12 to the square root of two then what is the area of the square

erastovalidia [21]

Answer:

Let there be a square ABCD with diagonal AC=12 root 2 cm

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pythagoras theoream

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hope it helps

Step-by-step explanation:

3 0

3 years ago