A, B & C form a triangle where ∠
BAC = 90°.
AB = 11 mm and CA = 7.3 mm.
Find the length of BC, giving your answer rounded to 1 DP.

The length of BC is 13.2

Step-by-step explanation:

In a ∆ ABC,

m∠A = 90°, AB = 11 mm and CA = 7.3 mm.

Now, by Pythagoras Theorem

(AB)² + (CA)² = (BC)²

(11)² + (7.3)² = (BC)²

121 + 53.3 = (BC)²

174.3 = (BC)²

(BC)² = 174.3

BC = √174.3

BC = 13.202 ≈ 13.2

Thus, The length of BC is 13.2

-TheUnknownScientist

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

-3.5 degrees per hour

step-by-step explanation:

find the unit rate:

-12   1/4 degrees           12.25 degrees

= - = -3.5 degrees per hour

      3   1/2 hours               3.5 hours