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GREYUIT [131]
3 years ago
5

Find the length of a third side of a triangle given two sides. please

Mathematics
1 answer:
Liono4ka [1.6K]3 years ago
3 0

Answer:  # 4.) 9.4

#5.) 10.2 cm  

#6.) 5 inches .

Step-by-step explanation: Assuming that a right triangle is expected, use the <u><em>Pythagorean Theorem</em></u> to calculate the third side: a² + b² = c²

5^{2}+8^{2}=89  Then take the square root of 89. A calculator is handy for most of these!

√89 = 9.433981 .  Round to 9.4

2^{2}+10^{2}=104

√104 = 10.1980  Round to 10.2 <u>Remember to include the units, cm in the answer.</u>

<u>Memorize this one:</u>

<u>Given side lengths of 3 & 4, the hypotenuse is 5!</u>

3² + 4² = 5²   Called a "Pythagorean Triple"

9 + 16 = 25

The square on the hypotenuse is a perfect square of 5

No calculator necessary, and you are likely to see this ratio in other questions.

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