maths chapter 3 cambridge 9 3a-3H
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23 Terms
3A FInding the length of the hypotenuese
3 A FIding length of hypotenuses ( rounding to 2 decimal place)
3A SSSssFinding the lenght of the hypotenuse
3b FInding the lenght if a shorter side
3b find the value of pronumeral round to rwo decimal D
3bFind value of pronumerral , round to two and give exact
3cApplying Pythagoras’ theorem
Two skyscrapers are located 25 m apart and a cable links the tops of the two buildings. Find the length of the cable if the buildings are 50 m and 80 m in height. Give your answer correct to two decimal places.
3 EUsing the given sides, write a trigonometric ratio (in fraction form) for each of the following triangles.
cos
3e SIn
3e tan
3f
solving x 3f
3g find the vvalue of pronumerals
3h Using inverse trigonometric ratios Find the value of θ to the level of accuracy indicated
3h finding unkown area
correct to two deciam place vs round
correct = placing the dsdical to the first number
rounding aftier 5
to correct = divide number by 100
no need to correct
For each of the following, find the value of x correct to two decimal places.
simplifiey fraction always
15/20 —> 3/4
solving for pronumeral note
round every number / f a number after deicmal is zero , the numbe remians ( 14.05—> 14,05)
when rounding to nearest meter or degree . dont add deicmal
No negative signs
if the number below the fraction mutkiply
