Exercises Part 2
Calculator
by justifying the measurement of angles: CAD and CDA

Part 2
1) give the value of BD
2) show that AD = 150
3) show that AC = 50
3) calculate the exact value of CD
Part 3
Check that x is the difference between the perimeters of triangles ABC and ABD
Part 4
1) Give the exact value of the area of ​​ABD then that of ACD
2) Complete with the exact value then approximate: area of ​​ABD = X area of ​​ACD​

c

c

c

c

c

c

c

cc

c

step-by-step explanation:

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

ok so what's the question?

step-by-step explanation: