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Phoenix [80]
3 years ago
14

How many 90 degrees angles does it take to make a full turn

Mathematics
2 answers:
iVinArrow [24]3 years ago
8 0
Four because 90+90+90+90 = 360, which is the angle f a circle 
blsea [12.9K]3 years ago
7 0
It requires 4 90 degree angles as 360/4. will be equal to 90
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Find a+b,2a+3b,IaI, and Ia-bI. a[5, -12], b=[-3, -6]
DENIUS [597]

Answer: 1) 2\hat{i}-18\hat{j} 2) \hat{i}-6\hat{j} 3) 13, 4) 10.

Step-by-step explanation:

Since we have given that

\vec{a}=5\hat{i}-12\hat{j}\\\\and\\\\\vec{b}=-3\hat{i}-6\hat{j}

So, we need to find :

1) a + b is given by

5\hat{i}-12\hat{j}-3\hat{i}-6\hat{j}\\\\=2\hat{i}-18\hat{j}

2) 2a+3b is given by

2(5\hat{i}-12\hat{j})+3(-3\hat{i}-6\hat{j})\\\\=10\hat{i}-24\hat{j}-9\hat{i}+18\hat{j}\\\\=\hat{i}-6\hat{j}

3) |a| is given by

\sqrt{5^2+(-12)^2}\\\\=\sqrt{25+144}\\\\=\sqrt{169}\\\\=13

4) |a-b| is given by

\sqrt{(5+3)^2+(-12+6)^2}\\\\=\sqrt{8^2+6^2}\\\\=\sqrt{64+36}\\\\=\sqrt{100}\\\\=10

Hence, 1) 2\hat{i}-18\hat{j} 2) \hat{i}-6\hat{j} 3) 13, 4) 10.

6 0
3 years ago
Which shows two expressions that are equivalent to (-8)(-12)(2)
Nataliya [291]

(-8)(-12)(2) = -8 • -12 • 2

192 //It's positive because - - = +.

Answer: 192

//Hope it helps.

7 0
3 years ago
Read 2 more answers
PLZ HELP ME 100 POINTS AND BRAINLEIST
Alina [70]

Answer:

measure of angle b = 65

measure of angle a = 35

measure of angle c = 80

8 0
3 years ago
HELPPPPP MEEEEE?????
pickupchik [31]

Answer:

A i think

Step-by-step explanation:

GOOD LUCK

4 0
3 years ago
Correct answers only please!!
Burka [1]

Answer:

7

Step-by-step explanation:

The distance between points A and B is 7.

Have a great day! :)

and can I please have brainliest?

7 0
3 years ago
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