Answer:
Triangle ADB is an isosceles triangle that has been split in half. Isosceles triangles are triangles whose base angles are equal and has 2 equal side lengths. For example triangle ADB has AD and DB equal along with m<a and m<b equal
Therefore, if we split this triangle into two half's then they are congruent (the same)
Right triangles have a 90° angle, usually marked by a square
this means that m<DCA is 90°;AD=DB=14m; CB=AC=11; AB=AC+CB=22
Step-by-step explanation:
Set up a proportion
3/7/12 = 1/x
3/7x = 12
x = 28
28 - 12 = 16
16 are left
12,250 - 250= 12,000
12,000 divided by 4 = 3,000
Serge has to save 3,000 a year
so 3,000 divided by 12 = 250.
Serge has to save 250 a month