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3 years ago

10

Can someone please help me with this. I'll give 50 points!

2 answers:

OlgaM077 [116]3 years ago

7 0

Answer:

the second one

Step-by-step explanation:

Wewaii [24]3 years ago

3 0

Answer:

2nd answer

Step-by-step explanation:

x less than -3

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2 years ago

In triangle ABC, AB = 11 cm, BC = 9 cm and CA = 10 cm.<br> Find the area of triangle ABC.

max2010maxim [7]

Answer:

Area = 42.43 square cm

Step-by-step explanation:

Using Heron's Formula :

$Area = \sqrt{s\times (s-a) \times (s-b) \times(s -c)} \ , \ where \ s \ =\ \frac{a+ b+ c}{2}$

<em><u>Find Area :</u></em>

<em><u></u></em>

$s = \frac{11 + 9 + 10 }{2} = \frac{30}{2} = 15$

$Area = \sqrt{15 \times ( 15 - 11 ) \times { (15 - 9 ) \times ( 15 -10)}\\\\$

$= \sqrt{15 \times 4 \times 6 \times 5}\\\\=\sqrt{1800}$

$= 42 . 43 \ cm^2$

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