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22.04.2021 •
Mathematics
PASAGOT PO MARAMING SALAMAT PO
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Ответ:
∡B = 60°
Step-by-step explanation:
find BC using Pythagorean Theorem:
5² + BC² = 10²
25 + BC² = 100
BC² = 75
BC =![\sqrt{75}](/tpl/images/2368/5433/8e7b0.png)
BC =![\sqrt{25}](/tpl/images/2368/5433/3e941.png)
which is 5![\sqrt{3}](/tpl/images/2368/5433/ba4cb.png)
this indicates that ∡B must be 60° because the ratio of sides in a 30-60-90 triangle are 1 :
: 2