Mathematics, 13.11.2020 07:00, xelynncaldera

7. ABCD is a four-sided shape but two of the sides cross. a ) Explain why the sum of the angles at A, B, C and D must be less than 360°.
b ) Find the sum of the angles at A, B, C and D,
giving a reason for your answer.

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7. ABCD is a four-sided shape but two of the sides cross. a ) Explain why the sum of the angles at...