2 years ago

Find the area of the triangle ABC.

Mathematics

1 answer:

DerKrebs [107]2 years ago

8 0

Answer:

Step-by-step explanation:

6*8=24

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Your friend shows you a coin collection. In it 45/50 of the coins are quarters. what percent of the coins are quarters?

Ksenya-84 [330]

Answer:

90% of them are quarters.

Step-by-step explanation:

If you take 50 and multiply it by two, you get 100. But, in order to get the right number, you have to multiply 45 by two as well. 45 x 2 is 90. 90 out of 100 is 90 percent. So 90% is the answer.

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3 years ago

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2)If triangle RPQ is a right angled triangle at Q. If PQ = 5cm and RQ = 10 cm,find (i) sin ^2 P (ii) cos ^2 R and tan R (iii) si

Scorpion4ik [409]

Answer: (i) 1 (ii) 3/4 , √3/3 (iii) 0 (iv) 1

<u>Step-by-step explanation:</u>

ΔRPQ is 1 30°-60°-90° triangle <em>because RQ = 2PQ</em> , where

∠R = 30°
∠P = 90°
∠Q = 60°

(i) sin² (90°) = 1² = 1

$\text{(ii)}\ \cos ^2(30^o)= \bigg(\dfrac{\sqrt3}{2}\bigg)^2=\dfrac{3}{4}$

$.\quad \tan (30^o)=\dfrac{1}{\sqrt3}\bigg=\dfrac{\sqrt3}{3}$

(iii) sin (90°) × cos (90°) = 1 × 0 = 0

(iv) sin² (90°) - cos² (90°) = 1² - 0² = 1

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