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2 years ago

In the right-angled triangle abc,ac is the hypotenuse with length 8cm, and ab=6 cm.

Mathematics

1 answer:

faltersainse [42]2 years ago

7 0

Answer:

Step-by-step explanation:

Hypotenuse = AC = 8 cm

AB = 6 cm

BC² + AB² = AC²

BC² = AC² - AB²

= 8² - 6²

= 64 - 36

= 28

$BC =\sqrt{28}=\sqrt{2*2*7}=2\sqrt{7} = 2*2.6458 =5.2916 = 5.29$

BC = 5.29 cm

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Answer:

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Step-by-step explanation:

Given

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3 years ago

If DF = 9x - 39, find Ef

Leviafan [203]

|DF| = |DE| + |EF| |DF| = 9x -36 |DE| = 47 |EF| = 3x+10 Substitute: 9x - 39 = 47 + 3x + 10 9x - 39 = 3x + 57 |+39 9x = 3x + 96 |-3x 6x = 96 |:6 x = 16 Put the value of x to the equation |EF| = 3x + 10 |EF| = (3)(16) + 10 = 48 + 10 = 58 Answer: |EF| = 58

Read more at Answer.Ya.Guru – https://answer.ya.guru/questions/4046336-if-df-9x-39-find-ef.html

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