2 years ago

Does someone mind helping me with this problem? Thank you!

Mathematics

1 answer:

Grace [21]2 years ago

4 0

Step-by-step explanation:

∠A + ∠B + ∠C = 180°

Here the value of ∠B and C is given below...we need to find the value of ∠A ....

a + 120° + 40° = 180°

a + 160° = 180°

a = 160° - 180°

a = 20°

$...$

You might be interested in

PLEASE HELP... VERY URGENT... WILL GIVE BRAINLIEST!!!

lakkis [162]

Answer:

Step-by-step explanation:

a) Pythagorean theorem,

altitude² + base² = hypotenuse²

h² + (w² - 1)² = (w² + 1)²

h² = (w² + 1)² - (w² - 1)²

{Compare with (a + b)² - (a -b)² = 4ab where a =w² & b = 1}

h² = 4*w²*1

h² = 4w²

$h=\sqrt{4w^{2}} = \sqrt{2*2*w*w} \\\\\\h = 2w$

b) Area of triangle = $\frac{1}{2}b*h$

$=\dfrac{1}{2}*(w^{2}-1) *2w\\\\= (w^{2}-1)*w = w^{2}*w - 1*w\\\\=w^{3}-w$

c) w =2

Area of triangle = 3w = 3*2 = 6

7 0

2 years ago

Aiden evaluated the expression <img src="https://tex.z-dn.net/?f=%20%5Cpi%20" id="TexFormula1" title=" \pi " alt=" \pi " align="

Archy [21]

The height is 12cm, and the diameter is 8cm.

4 0

3 years ago

Read 2 more answers

You take a bite of a cookie and begin to crush it between your teeth making smaller bits in your mouth.

timofeeve [1]

Physical, you aren't changing the substance, you are just changing the shape of the cookie

5 0

2 years ago

Which number in the set {6, 12, 18, 36} satisfies the equation 3x - 9 = 27? Explain

PIT_PIT [208]

Answer:

Step-by-step explanation:

3 x 12= 36

36-9= 27

3 0

2 years ago

What transformation is shown below?

hram777 [196]

The transformation is rotation.

7 0

2 years ago

Read 2 more answers