Answer:
2x-15
Step-by-step explanation:
x+2x-15=90
3x-15=90
3x=90+15
x=105/3
the other angle is 55
construction = divide the figure into two parts.
now we have triangle abd and bdc.
first calculate the area of abd.
area of triangle= 1/2×base ×height
area of triangle= 1/2×18×7.5
area of triangle=67.5cm²
second calculate area of bdc
area of triangle=1/2×15.6×11.7
area of triangle=91.26cm²
area of the figure=area of abd + area of bdc
area of the figure=67.5cm²+ 91.26cm²
area of figure=158.76 cm².
Basically a terminating decimal is a decimal with an exact answer when you have no remainder left over. A repeating decimal is when you can never reach zero no matter how many times you divide the answer. It is always written with a line on top to show that it goes on forever and ever and it never ends.
