alex1596 alex1596

11-08-2021
Mathematics

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Simple Algebra problem. Includes the x and y axis. Also need help finding the perimeter.

Simple Algebra problem Includes the x and y axis Also need help finding the perimeter class=

Respuesta :

amadzifa25 amadzifa25

11-08-2021

Answer:

31.5cm²

Step-by-step explanation:

area of a triangle =1/2 b h

b= 7cm

h=9cm

1/2×7×9

= 1/2×63

= 31.5cm²

hypotenuse is unknown so,

c²=a²+b²

c²= 7² + 9²

= 49 + 81

c²= 130

c= 11.4cm

perimeter= 7 +9+11.4

=27.4cm

pls note that no unit was stated

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