Triangle ABC has perimeter 22cm AB = 8cm
BC = 5cm

By calculation, deduce whether triangle ABC is a right-angled triangle

Step-by-step explanation:

To calculate this we use Pythagoras' theorem: a^2+b^2=c^2

in this case a=8cm, b=5cm and c=22

so we do 8^2+5^2=89

the square root of 89 is 9.4 (1 d.p)

8+5+9.4=22.4 so rounded (22), this triangle is a right-angled triangle since Pythagoras theorem has proved ABC is a right-angled triangle

d. millimeters per hour.

step-by-step explanation:

we are given that,

carlo used a rain gauge to measure the amount of water his lawn is receiving from the sprinklers.

since, according to the options, we see that,

water cannot be measured by 'miles per hour', 'meters per second' and 'grams per seconds'.

we get that, the water can be measured by 'millimeters per hour'.

hence, the appropriate rate for describing the amount of water is 'millimeters per hour'.

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step-by-step explanation:

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