Answer:
area = 32 in²
Step-by-step explanation:
the area (A) of a triangle is
A = 
bh ( b is the base and h the perpendicular height )
here b = 8 and h = 8, hence
A = × 8 × 8 = 32 in²
Answer:
20 squared + 35 squared = d squared
Step-by-step explanation:
The Pythagorean theorem a^2+b^2=c^2
Answer:
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Answer:
29
Step-by-step explanation:
Let a12 be the mean of the first 12 numbers:
a12=(sumOf12Numbers)/12.
So, sumOf12Numbers=12×a12
We add a new number, x:
a13=(sumOf12Numbers+x)/13
13×a13=12×a12+x
x=13×a13-12×a12=13×5-12×3=65-36=29
The thirteenth number is 29
