Hmmmmm... I don’t really know I’m so sorry I couldn’t help :(( good luck though!
The two triangles with the given perimeter is attached .
Perimeter is the sum of all sides.
For the first triangle , sies are 2a,2a and b.
So the perimeter is

For the second triangle, sides are a,a, and 2a+b. Therefore perimeter is

So for both triangles, perimeter is

Answer:
The length of the mid-segment of the trapezoid = 7
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Step-by-step explanation:
The mid-segment of a trapezoid is the segment that connecting the midpoints of the two non-parallel sides.
As shown in the figure the two non-parallel sides are AB and CD
∴ The mid-segment of the trapezoid = 
From the figure: BC = 8 and AD = 6
∴ The mid-segment of the trapezoid = 
Answer:
420 seconds
Step-by-step explanation:
(60 seconds in a minute, 60 x 7 = 420)
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