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3 years ago

What is the area of the right triangle below? 12 15

Mathematics

2 answers:

e-lub [12.9K]3 years ago

8 0

Answer:

90 units^2

Step-by-step explanation:

Area of a triangle = 1/2 x b x h

assuming that 12 and 15 are its measurements,

I am going ahead with:

1/2 x 12 x 15 = 1/2 x 180 = 90units^2

since cm or m is not given I have written units. Please change accordingly.

Hope this helps

netineya [11]3 years ago

3 0

90 units ^2
Area of a triangle =1/2 x b x h

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Statements

vazorg [7]

Answer:

See Explanation

Step-by-step explanation:

The question has unclear information.

So, I'll answer from scratch

Given

ABC = Right angled triangle

DB bisects ABC

Required

Prove that CBD = 45

From the question, we have that:

ABC is right angled at B

So, when DB bisects ABC, it means that DB divides ABC into two equal angles.

i.e.

$CBD = ABD$

and

$CBD + ABD = 90$

Substitute CBD for ABD in $CBD + ABD = 90$

$CBD + CBD = 90$

$2CBD = 90$

Divide both sides by 2

$\frac{2CBD}{2} = \frac{90}{2}$

$CBD = \frac{90}{2}$

$CBD = 45$

Hence, it is proved that $CBD = 45$

Follow the above explanation and use it to answer your question properly

6 0

2 years ago

The circle given by : x^2 + y^2 - 6y - 12 = 0 can be written as:

deff fn [24]

Step-by-step explanation:

Given equation of circle is,

${x}^{2} + {y}^{2} - 6y - 12 = 0 \\ by \: compairing \: it \: with \: \\ {x}^{2} + {y}^{2} + 2gx + 2fy = 0 \: we \: get \\2 g = 0 \: or \: g = 0 \\ 2f= - 6 \\ or \: f= - 3 \\ c = - 12$

again the another form of circle is,

${x}^{2} + {(y - k)}^{2} = 21 \\ or \: {x}^{2} + {y}^{2} - 2ky + {k}^{2} - 21 = 0 \\ by \: compairing \:it \: with \: \\ {x}^{2} + {y}^{2} + 2gx + 2fy = 0 \: we \: get \\ g = 0 \\f = - k \\ c = {k}^{2} - 21$

now equating the values of f in both equations,

-k=-3

i.e. k=3

therefore k=3

4 0

3 years ago

In rhombus ABCD, the diagonal line AC and line BD intersect at E. If AE=5 and BE = 12, what is the length of line AB?

Reika [66]

From a formula located here:
http://www.1728.org/quadltrl.htm
we see that
4 • Side² = Long Diagonal² + Short Diagonal²
Long Diagonal = 24
Short Diagonal = 10
4 • Side² = 24^2 + 10^2 
4 • Side² = 576 + 100
4 • Side² = 676
Side² = 169
Side (or line AB) = 13

8 0

3 years ago

Create an equation for the following scenario:

Ivanshal [37]

Hey there! I'm happy to help!

Sum means you add. Let's call our number n.

n+15

We double the whole thing.

2(n+15)

This is equal to something.

2(n+15)=

Difference means you subtract.

2(n+15)=n-6.

Have a wonderful day! :D

6 0

3 years ago

Read 2 more answers

B is the midpoint of, AB = x² + 2x + 25 and BC = 40. What are the values of x?

8_murik_8 [283]

Answer:

x=3, -5.

Step-by-step explanation:

x^2+2x+25=40

x^2+2x+25-40=0

x^2+2x-15=0

factor out the trinomial,

(x-3)(x+5)=0

zero property,

x-3=0, x+5=0,

x=0+3=3,

x=0-5=-5.

6 0

2 years ago