The angles ratio

The angles in the ABC triangle are in the ratio 1: 2: 3. find the sizes of the angles and determine what kind of a triangle it is.

Correct answer:

A =  30 °
B =  60 °
C =  90 °

Step-by-step explanation:

$$\begin{gathered} A:B:C=1:2:3 \\ d=180\mathrm{/}(1+2+3)=30^{\circ } \\ A=1\cdot d=1\cdot 30=30^{\circ } \end{gathered}$$

$B=2\cdot d=2\cdot 30=60^{\circ }$

$C=3\cdot d=3\cdot 30=90^{\circ }$

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