aminulmia aminulmia

21-01-2021
Mathematics

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jimrgrant1 jimrgrant1

21-01-2021

Answer:

a = 16

Step-by-step explanation:

The altitude YB is at right angles to the base XZ , then

∠ YBZ = 90° , so

6a - 6 = 90 ( add 6 to both sides )

6a = 96 ( divide both sides by 6 )

a = 16

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