The three inside angles (a, b and c) of a right-angled triangle are in the ratio 7: 18: 11 the smallest angle is 35 degrees work out angles a, b and c

Therefore the measure of the angles of a right angled triangle ABC are,

Step-by-step explanation:

Let the Common multiple be  ' x '

given the angles are in the ratio 7 : 18 : 11

Therefore the angles are

∠A = 7x , ∠B = 18x  , ∠C = 11x

To Find:

∠A = ? , ∠B = ? , ∠C =?

Solution:

Triangle sum property:

In a Triangle sum of the measures of all the angles of a triangle is 180°.

  ..Triangle sum property.

Substituting the values we get

substitute ' x ' in the measure angles we get

Therefore the measure of the angles of a right angled triangle ABC are,

your answer is b ^w^ hope i

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺