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sukhopar [10]
3 years ago
11

State the size of angle OAB, giving a reason for your answer

Mathematics
1 answer:
lina2011 [118]3 years ago
5 0

Answer:

OAB is 90°

Explanation -

Given - A circle with centre O

According to the theorem , The tangent of a circle and the line of tangency make an angle of 90°

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To solve problem 19, we must remember the order of operations. PEMDAS tells us that we should simplify numbers in parentheses first, exponents next, multiplication and division after that, and finally addition and subtraction. Using this knowledge, we can begin to simplify the problem by working out the innermost set of parentheses:

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Next, we should still simplify what is inside the parentheses but continue to solve the exponents (the next letter in PEMDAS).

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Now, we can move onto problem 20:

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4d - 6

Therefore, your answer to problem 19 is 6 and the answer to problem 20 is 4d -6.

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