SDG

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Microsoft Word - EMKF_mikroplast_lopparuanne_02.11.2020 (pria.ee)

Task definition

Find out the area of the triangle (the smaller one) measure it from the corners. You can calculate the area two ways. Then use a part of the number that you got to find out what is the maximum reading of most Japanese cars speedometers. For the last part subtract 100 from the previous number that you got to find out the last answers.  Last answer difference is 20.

Solution move

1. Measure the triangle from corners
2. Use a part of the number
3. Substract 100 from the previous number
4. Last answer differences is 20.

Mathematical calculation step
Solution 1.

 (alus x kõrgus)S= a×h:2=
574×627,48:2= 180 086 cm²
Solution 2.
p= a+b+c
690+690+574:2 = 977
S=√ p (p-a)(p-b)(p-c)=
S=√977×(977-690)(977-690)(977-574)=
S=√977×287×787×403= √324 312 287 39=
180 086 cm²
Use A part of the number 180 086= 180km/h
for the last part subtract 100 from the previous number
180-100= 80

Hint 1

Solution 1. 
S= a×h:2=

Hint 2

p= a+b+c
S=√ p (p-a)(p-b)(p-c)=

The area of the triangle is 180 086 cm²

Connection to the study

 My study field Traffic safety is related to the part where you have to find out the maximum reading of Japanese cars speedometers is 180km/h.