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3 years ago

7

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help

1 answer:

lara [203]3 years ago

3 0

Answer:

7

Step-by-step explanation:

use desmos it really helps

hope this helped

plz mark Brainliest

i wanna rank up ;DDD

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Answer:

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Step-by-step explanation:

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Can atriangle be formed with side lengths of 5cm. 10cm and 15cm

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Theorem of cosine:
a²=b²+c²-2bc(cos α) ⇒cos α=-(a²-b²-c²) / 2bc

In this case:
a=15 cm
b=10 cm
c=5 cm

cos α=-(15²-10²-5²) / 2*10*5
cos α=-100 / 100
cos α=-1

A=arc cos -1=180º This is impossible, because:

A+B+C=180º; then B=C=0º This is impossible for make a triangle (B>0 and C>0 if we want to make a triangle).

Therefore: it is not possible can make a triangle with side lengths of 5 cm, 10 cm and 15 cm.

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Attached Image

Step-by-step explanation:

Vertex: (5, -5)

X-Intercepts: (1,0) (9,0)

Y-Intercepts: (0, 2.813)

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