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    NationalMediumGeometry5–6

    A triangle has angles of 35∘35^\circ and 90∘90^\circ. What is the third angle?

    Um triângulo tem ângulos de 35∘35^\circ e 90∘90^\circ. Qual é o terceiro ângulo?

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    Solution

    The sum of angles in a triangle is 180∘180^\circ. So the third angle =180∘−35∘−90∘=55∘= 180^\circ - 35^\circ - 90^\circ = 55^\circ.