Answer:
D.
Step-by-step explanation:
If the triangle has one angle that is equal to 90 then it is a right triangle.
For the given right triangle, the perimeter is 60cm, so the correct option is D.
<h3>
</h3><h3>
How to get the perimeter of the triangle?</h3>
We can see a right triangle, by using the Pythagorean theorem we can get the missing cathetus:


Now we know the measure of the 3 sides, then the perimeter of the given triangle is:
P = 15cm + 20cm + 25cm = 60cm
The perimeter of the triangle is 60cm.
If you want to learn more about right triangles:
brainly.com/question/2217700
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Answer:
Please find the complete question in the attached file.
Step-by-step explanation:
For point 1:
At this point we make up triangles for the first one makes up by 3 matches figure 2 make up by 5 matches figure 3 makes up by 7 matches.
For point 2:
you can try to
draw to find values
For point 3:
number of matches
For point 4:

Answer:
x = -8, x = 4
Step-by-step explanation:
x² + 4x - 12 = 0
(x + 8) (x - 4) = 0
x + 8 = 0, x = -8
x - 4 = 0, x = 4