13. calcule:
a) a medida do ângulo interno de um triângulo equilátero
b) a soma das medidas dos ângulos internos de um polígono de 13 lados.
c) a medida do ângulo interno de um octógono regular.
d) a medida dos ângulos externos de um decágono regular.
e) a soma das medidas dos ângulos externos de um polígono regular de 12 lados.

como posso calcular estas questões?

3; 9 is 8 to -4

step-by-step explanation:

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: