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02.07.2020 •
Mathematics
Given: BC ⊥ CA , Prove: m∠A+m∠B=90°
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Ответ:
With points A, B and C a right triangle is formed.
Given that BC ⊥ CA, then m∠C = 90°.
The addition of the angles of a triangle is equal to 180°, therefore:
m∠A + m∠B + m∠C = 180°
Substituting with m∠C = 90°:
m∠A + m∠B + 90° = 180°
m∠A + m∠B = 180° - 90°
m∠A + m∠B = 90°
Ответ:
30,000 mg
Step-by-step explanation:
In this case what we should do multiply the daily quantity by the number of days, that is:
They tell us that the daily amount is 500 milligrams, that is, 500 mg / day.
Now, the total time they tell us is 60 days, so we have:
500 mg / day * 60 day = 30,000 mg
That is, a total of 30,000 milligrams of chlorine in the 60 days.