August 2018 2 18 Report
1. hitunglah keliling segitiga dengan panjang sisi - sisinya sebagai berikut .
a. 4,5 cm; 7,5 cm; 5,5cm;
b. 8 cm; 16 cm; 12 cm;
c. 25 cm; 35 cm; 20 cm
2. diketahui luas sebuah segitiga adalah 165 cm² dan panjang alasnya 22 cm.
hitunglah tinggi segitiga ??
3 Sebidang tanah berbentuk segitiga dengan panjang tiap sisi tanah berturut - turut 4 m, 5 m, dan 7 m. Di sekeliling tanah tersebut akan dipasang pagar dengan biaya Rp85.000,00 per meter. Berapakah biaya yang diperlukan untuk pemasangan pagar tersebut?
4. Permukaan sebuah kotak perhiasan berbentuk segitiga. Jika panjang sisi kotak tersebut 2 cm, 3 cm, dan 4 cm dengan tinggi permukaan kotak 2,5 cm,
tentukan ..
a. keliling permukaan kotak
b. luas permukaan kotak .

More Questions From This User See All

Andi : hi, sinta. i want to teach my little brother origami. but i don't know what kind of origami should be taught to him. do you think dinosaur origami is difficult for him ?sinta : well, i think so. what about a boat ?andi : that's a good idea. that's my brother, can you teach him ?sinta : what .... me ?andi : yup ...... riko come here. you like origami, don't you ?riko : Uhum ...andi : well, sinta will teach you how, make a boat.riko : really ?!sinta : Yup .... it's easy. listen carefully and follow me.riko : yes, I'm ready .sinta : take a half page of paper and you don't need scissors or glue to do it. now follw the steps. first, fold,the paper in half the long way , crease and unfold .riko : then.sinta : the second step , fold the sides up to the middle crease and keep it folded .riko : ok, done sinta : next, fold the corners donwn to the middle . and the do the same way are you still with me ?riko :wait ... wait can you repeat it ?sinta : sure. please fold the corners down to the middle. and do it twice .riko : got it. and what's the next step ?sinta : finally, open the middele and turn it in side out to make a boat. finish , it's simple, isn't it ?riko : thank you . i learnt a lot from you.task 12 1. who wants to teach riko origami ?2. what is the origami ?3. how many steps are they to make the origami ?4. what is the material ?5. what is the first step ?6. do they need scissors and glue ?7. what is the second step ?8. what is the final step ?
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