Answer:
a
Step-by-step explanation:
The area (A) of a triangle is calculated as
A =
bh ( b is the base and h the perpendicular height )
Here b = 9 and h = 12 , then
A =
× 9 × 12 =
× 108 = 54 cm²
Answer:
x = 12
Step-by-step explanation:
(2x + 4) and (12x + 8) are same- side interior angles and sum to 180° , then
2x + 4 + 12x + 8 = 180
14x + 12 = 180 ( subtract 12 from both sides )
14x = 168 ( divide both sides by 14 )
x = 12
Answer:
100 years old
Step-by-step explanation:hope it helps:)
Step-by-step explanation:
The sum of consecutive squares is

Therefore
