Question

Help me with this please!

Answer 1

`35 cm^(2)`

Explanation:

What you need to do is break it down into smaller steps, for me at least, my advice is to ignore the cm in this case until your done with the problem considering the entire problem is in centimeters:

STEP 1:

Mark the sides of your triangle with sides a, b, and c. Find out the full length of side b:

side b = 3 + 5 + 2

side b = 10

STEP 2:

Find the area of the right triangle using the equation 1/2 * a * b and mark the answer as t:

t = 1/2 * a * b

t = 1/2 * 9* 10

t = 1/2 * 90 (this is pretty much dividing 90 by 2)

t = 45

STEP 3:

Find the area of the rectangle using the equation a = w * h and mark the answer as r. a = area, w = width, h = height:

a = w * h

a = 5 * 2

a = 10

STEP 4:

Subtract t (area of the triangle) - r (area of the rectangle) to find your final answer:

t - r = answer

45 - 10 = answer

35 = answer

STEP 5:

Due to the fact we are dealing with a 2-dimensional shape instead of a 3 dimensional one (a square instead of a cube), we need to use
`cm^(2)` instead of
`cm^(3)`.

FINAL ANSWER:

`35cm^(2)`

And with that, we've just knocked out a math problem without too much of an issue. Well done! :)

Answer 2

35

Explanation:

9×10÷2=45

5×2= 10

45-10=35

I think