A cylindrical water tank near the town library is 20 meters high and has a circumference of 39 meters. What is the approximate v
1 answer:
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Answer:
Step-by-step explanation:
The sum of the interior angles of a polygon with sides is
. Since the shape in the figure has 5 sides, the sum of its interior angles is
.
Therefore, we can set up the following equation:
Since and
make up one side of a line, they are supplementary, as each side of a line is
.
Thus, we have:
Answer: 40
ADE = 70 por suma de angulos interiores en triangulo ADE
En triangulos BDE y AED
AE=BE por dato
DE lado comun
AED= BED= 90
por tanto los triangulos son iguales por tener dos lados y el angulo comprendido respectivamente iguales
Luego ADE = BDE = 70 y AD=BD=BC por ser triangulos BDE y AED iguales
Luego triangulo BDC isosceles de base DC
ADE + BDE + BDC = 180 por suma de angulos consecutivos
BDC = 180 - 70 -70 = 40
Ф = BDC =BCD = 40 por ser angulos bases de un triangulo isosceles
