Question

if triangle abc is right tiangle, such that angle C is equal to 90 degree ,angle A is equal to 45 deegre and BC is equal to 7units ,find angle B ,AB ,AC

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

A+B+C=180°{angle sum property

45°+90°+C=180°

C=180°-135°

C=45

Therefore, from above we know that∆ABC is isosceles ∆

therefore AC=AC{isosceles triangle theorem}

Therefore,AC=7cm

Therefore,by Pythagoras theorem

AB^2=AC^2+BC^2

=7^2+7^2

=49+49

=98

AC=√98

=7√2