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2 years ago

13

David told Jen, "Write three two-digit numbers. I'll add three more and give you the sum right away." Jen wrote 53, 42, and 31.

Then David wrote 46, 57, and 68 and said the sum was 297. Was he right? What pattern did he use?

1 answer:

alina1380 [7]2 years ago

8 0

He is correct. The pattern is -11,-11+15,+11 and +11

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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

We have been given an isosceles right triangle

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Figure is shown in attachment

By Pythagoras theorem

$BC^2=AC^2+AB^2$

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On substituting the values in the Pythagoras theorem:

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And other method of area of triangle is:

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