Maths question!!! The angles in triangle ABC are given in degrees, prove that AB=AC

Mathematics

2 answers:

ra1l [238]2 years ago

8 0

Do 12x+20=40x-8 and solve for x

ra1l [238]2 years ago

5 0

First, find out the value of x to confirm if they are really true.

We know that all the interior angles of a triangle equal to 180 degrees.

4x+5x-8+3x+20=180
12x=180-12
12x=168
x=168/12
x=14

Put in these values of to find if AB=AC.

(4×14)(3×14+20)=(4×14)(5×14-8)

Solve for LHS first,

(4×14)(3×14+20) = 56×62

=3472

Solve for RHS next,

(4×14)(5×14-8) = 56×62

=3472

Since LHS=RHS, AB is also equal to AC.

Hope I helped :)

You might be interested in

I can't figure this out and didn't see it on brainly, pls help

ch4aika [34]

Answer:

it's 8

Step-by-step explanation:

(10×1/5)^3=2^3=8

6 0

2 years ago

Read 2 more answers

Here are the scores of students on a history test. 55, 56, 57, 58, 58, 64, 65, 66, 69, 75, 77, 78, 81, 81, 85, 86, 91. Create a

Anarel [89]

The first thing you need to do is get the median of the whole set.

The median is the center so since there are 17 numbers the center is 69 and 69 is Q2

Next we need to find Q1 Q3 and Q4 Also, are whiskers are below.
Whisker minimum = 55
Whisker maximum = 91

Now to find Q1 we have to get the median of the first half of the data.
We need to get the median of the following data set.
55, 56, 57, 58, 58, 64, 65, 66

(58+58) / 2 = 58
Q1 = 58

Now we need to find Q3. To do that we get the median of the second half of the data.
75, 77, 78, 81, 81, 85, 86, 91.
(81 + 81) / 2 = 81
Q3 = 81

Now we have all our quartiles and whiskers, which are below, it is time to create our box and whisker plot. Note, create a horizontal or vertical number line with appropriate data. Also the box part is from Q1 to Q3 and your whiskers goes from your minimum to your box and from your maximum to your box.

Whisker Minimum = 55
Q1 = 58
Q2 = 69
Q3 = 81
Whisker Maximum = 91